├── LICENSE
├── README.md
├── ctcss-pll.grc
└── top_block.py


/LICENSE:
--------------------------------------------------------------------------------
 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2013 jazzkutya
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of
 6 | this software and associated documentation files (the "Software"), to deal in
 7 | the Software without restriction, including without limitation the rights to
 8 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 9 | the Software, and to permit persons to whom the Software is furnished to do so,
10 | subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | grctcssdec
 2 | ==========
 3 | 
 4 | CTCSS decoder with gnuradio
 5 | 
 6 | very early stage, only a flow graph yet but it's usable with a CTCSS frequency chart (try wikipedia).
 7 | 
 8 | Minimal docs here
 9 | 
10 | Most cpu hungry part is the complex bandpass filter which seems needed
11 | by the pll block to lock on the ctcss frequency accurately.
12 | The pll is also disturbed by DC which proved to be pretty heavy with linrad nbfm.
13 | I've loosened up the settings already to eat less cpu (most important is the transition width).
14 | I need to refresh my memory (actually re-study :)) about the windowing stuff.
15 | 
16 | The pll block needs about this much sample rate for signals in the range 60-270Hz because
17 | it has a limited bandwidth (max pi/50 in radians/samples).
18 | 
19 | The keep 1 in N block also helps reduce cpu load, no need to do moving average at full sample rate.
20 | 


--------------------------------------------------------------------------------
/ctcss-pll.grc:
--------------------------------------------------------------------------------
  1 | <?xml version='1.0' encoding='ASCII'?>
  2 | <flow_graph>
  3 |   <timestamp>Tue Nov 19 23:15:56 2013</timestamp>
  4 |   <block>
  5 |     <key>options</key>
  6 |     <param>
  7 |       <key>id</key>
  8 |       <value>top_block</value>
  9 |     </param>
 10 |     <param>
 11 |       <key>_enabled</key>
 12 |       <value>True</value>
 13 |     </param>
 14 |     <param>
 15 |       <key>title</key>
 16 |       <value></value>
 17 |     </param>
 18 |     <param>
 19 |       <key>author</key>
 20 |       <value></value>
 21 |     </param>
 22 |     <param>
 23 |       <key>description</key>
 24 |       <value></value>
 25 |     </param>
 26 |     <param>
 27 |       <key>window_size</key>
 28 |       <value>1280, 1024</value>
 29 |     </param>
 30 |     <param>
 31 |       <key>generate_options</key>
 32 |       <value>wx_gui</value>
 33 |     </param>
 34 |     <param>
 35 |       <key>category</key>
 36 |       <value>Custom</value>
 37 |     </param>
 38 |     <param>
 39 |       <key>run_options</key>
 40 |       <value>prompt</value>
 41 |     </param>
 42 |     <param>
 43 |       <key>run</key>
 44 |       <value>True</value>
 45 |     </param>
 46 |     <param>
 47 |       <key>max_nouts</key>
 48 |       <value>0</value>
 49 |     </param>
 50 |     <param>
 51 |       <key>realtime_scheduling</key>
 52 |       <value></value>
 53 |     </param>
 54 |     <param>
 55 |       <key>_coordinate</key>
 56 |       <value>(10, 11)</value>
 57 |     </param>
 58 |     <param>
 59 |       <key>_rotation</key>
 60 |       <value>0</value>
 61 |     </param>
 62 |   </block>
 63 |   <block>
 64 |     <key>variable</key>
 65 |     <param>
 66 |       <key>id</key>
 67 |       <value>samp_rate</value>
 68 |     </param>
 69 |     <param>
 70 |       <key>_enabled</key>
 71 |       <value>True</value>
 72 |     </param>
 73 |     <param>
 74 |       <key>value</key>
 75 |       <value>44100</value>
 76 |     </param>
 77 |     <param>
 78 |       <key>_coordinate</key>
 79 |       <value>(312, 19)</value>
 80 |     </param>
 81 |     <param>
 82 |       <key>_rotation</key>
 83 |       <value>0</value>
 84 |     </param>
 85 |   </block>
 86 |   <block>
 87 |     <key>import</key>
 88 |     <param>
 89 |       <key>id</key>
 90 |       <value>import_0</value>
 91 |     </param>
 92 |     <param>
 93 |       <key>_enabled</key>
 94 |       <value>True</value>
 95 |     </param>
 96 |     <param>
 97 |       <key>import</key>
 98 |       <value>from math import pi</value>
 99 |     </param>
100 |     <param>
101 |       <key>_coordinate</key>
102 |       <value>(209, 22)</value>
103 |     </param>
104 |     <param>
105 |       <key>_rotation</key>
106 |       <value>0</value>
107 |     </param>
108 |   </block>
109 |   <block>
110 |     <key>audio_source</key>
111 |     <param>
112 |       <key>id</key>
113 |       <value>audio_source_0</value>
114 |     </param>
115 |     <param>
116 |       <key>_enabled</key>
117 |       <value>True</value>
118 |     </param>
119 |     <param>
120 |       <key>samp_rate</key>
121 |       <value>samp_rate</value>
122 |     </param>
123 |     <param>
124 |       <key>device_name</key>
125 |       <value>default</value>
126 |     </param>
127 |     <param>
128 |       <key>ok_to_block</key>
129 |       <value>True</value>
130 |     </param>
131 |     <param>
132 |       <key>num_outputs</key>
133 |       <value>1</value>
134 |     </param>
135 |     <param>
136 |       <key>affinity</key>
137 |       <value></value>
138 |     </param>
139 |     <param>
140 |       <key>minoutbuf</key>
141 |       <value>0</value>
142 |     </param>
143 |     <param>
144 |       <key>_coordinate</key>
145 |       <value>(41, 114)</value>
146 |     </param>
147 |     <param>
148 |       <key>_rotation</key>
149 |       <value>0</value>
150 |     </param>
151 |   </block>
152 |   <block>
153 |     <key>blocks_float_to_complex</key>
154 |     <param>
155 |       <key>id</key>
156 |       <value>blocks_float_to_complex_0</value>
157 |     </param>
158 |     <param>
159 |       <key>_enabled</key>
160 |       <value>True</value>
161 |     </param>
162 |     <param>
163 |       <key>vlen</key>
164 |       <value>1</value>
165 |     </param>
166 |     <param>
167 |       <key>affinity</key>
168 |       <value></value>
169 |     </param>
170 |     <param>
171 |       <key>minoutbuf</key>
172 |       <value>0</value>
173 |     </param>
174 |     <param>
175 |       <key>_coordinate</key>
176 |       <value>(273, 109)</value>
177 |     </param>
178 |     <param>
179 |       <key>_rotation</key>
180 |       <value>0</value>
181 |     </param>
182 |   </block>
183 |   <block>
184 |     <key>band_pass_filter</key>
185 |     <param>
186 |       <key>id</key>
187 |       <value>band_pass_filter_0</value>
188 |     </param>
189 |     <param>
190 |       <key>_enabled</key>
191 |       <value>True</value>
192 |     </param>
193 |     <param>
194 |       <key>type</key>
195 |       <value>fir_filter_ccc</value>
196 |     </param>
197 |     <param>
198 |       <key>decim</key>
199 |       <value>1</value>
200 |     </param>
201 |     <param>
202 |       <key>interp</key>
203 |       <value>1</value>
204 |     </param>
205 |     <param>
206 |       <key>gain</key>
207 |       <value>1</value>
208 |     </param>
209 |     <param>
210 |       <key>samp_rate</key>
211 |       <value>samp_rate</value>
212 |     </param>
213 |     <param>
214 |       <key>low_cutoff_freq</key>
215 |       <value>60</value>
216 |     </param>
217 |     <param>
218 |       <key>high_cutoff_freq</key>
219 |       <value>255</value>
220 |     </param>
221 |     <param>
222 |       <key>width</key>
223 |       <value>100</value>
224 |     </param>
225 |     <param>
226 |       <key>win</key>
227 |       <value>firdes.WIN_BLACKMAN</value>
228 |     </param>
229 |     <param>
230 |       <key>beta</key>
231 |       <value>6.76</value>
232 |     </param>
233 |     <param>
234 |       <key>affinity</key>
235 |       <value></value>
236 |     </param>
237 |     <param>
238 |       <key>minoutbuf</key>
239 |       <value>0</value>
240 |     </param>
241 |     <param>
242 |       <key>_coordinate</key>
243 |       <value>(482, 50)</value>
244 |     </param>
245 |     <param>
246 |       <key>_rotation</key>
247 |       <value>0</value>
248 |     </param>
249 |   </block>
250 |   <block>
251 |     <key>blocks_null_sink</key>
252 |     <param>
253 |       <key>id</key>
254 |       <value>blocks_null_sink_0</value>
255 |     </param>
256 |     <param>
257 |       <key>_enabled</key>
258 |       <value>False</value>
259 |     </param>
260 |     <param>
261 |       <key>type</key>
262 |       <value>float</value>
263 |     </param>
264 |     <param>
265 |       <key>vlen</key>
266 |       <value>1</value>
267 |     </param>
268 |     <param>
269 |       <key>affinity</key>
270 |       <value></value>
271 |     </param>
272 |     <param>
273 |       <key>_coordinate</key>
274 |       <value>(711, 444)</value>
275 |     </param>
276 |     <param>
277 |       <key>_rotation</key>
278 |       <value>0</value>
279 |     </param>
280 |   </block>
281 |   <block>
282 |     <key>wxgui_numbersink2</key>
283 |     <param>
284 |       <key>id</key>
285 |       <value>wxgui_numbersink2_0</value>
286 |     </param>
287 |     <param>
288 |       <key>_enabled</key>
289 |       <value>True</value>
290 |     </param>
291 |     <param>
292 |       <key>type</key>
293 |       <value>float</value>
294 |     </param>
295 |     <param>
296 |       <key>title</key>
297 |       <value>Number Plot</value>
298 |     </param>
299 |     <param>
300 |       <key>units</key>
301 |       <value>Hz</value>
302 |     </param>
303 |     <param>
304 |       <key>samp_rate</key>
305 |       <value>samp_rate</value>
306 |     </param>
307 |     <param>
308 |       <key>min_value</key>
309 |       <value>50</value>
310 |     </param>
311 |     <param>
312 |       <key>max_value</key>
313 |       <value>280</value>
314 |     </param>
315 |     <param>
316 |       <key>factor</key>
317 |       <value>1</value>
318 |     </param>
319 |     <param>
320 |       <key>decimal_places</key>
321 |       <value>2</value>
322 |     </param>
323 |     <param>
324 |       <key>ref_level</key>
325 |       <value>0</value>
326 |     </param>
327 |     <param>
328 |       <key>number_rate</key>
329 |       <value>15</value>
330 |     </param>
331 |     <param>
332 |       <key>peak_hold</key>
333 |       <value>False</value>
334 |     </param>
335 |     <param>
336 |       <key>average</key>
337 |       <value>False</value>
338 |     </param>
339 |     <param>
340 |       <key>avg_alpha</key>
341 |       <value>0</value>
342 |     </param>
343 |     <param>
344 |       <key>show_gauge</key>
345 |       <value>True</value>
346 |     </param>
347 |     <param>
348 |       <key>win_size</key>
349 |       <value></value>
350 |     </param>
351 |     <param>
352 |       <key>grid_pos</key>
353 |       <value></value>
354 |     </param>
355 |     <param>
356 |       <key>notebook</key>
357 |       <value></value>
358 |     </param>
359 |     <param>
360 |       <key>affinity</key>
361 |       <value></value>
362 |     </param>
363 |     <param>
364 |       <key>_coordinate</key>
365 |       <value>(239, 213)</value>
366 |     </param>
367 |     <param>
368 |       <key>_rotation</key>
369 |       <value>180</value>
370 |     </param>
371 |   </block>
372 |   <block>
373 |     <key>wxgui_fftsink2</key>
374 |     <param>
375 |       <key>id</key>
376 |       <value>wxgui_fftsink2_0</value>
377 |     </param>
378 |     <param>
379 |       <key>_enabled</key>
380 |       <value>False</value>
381 |     </param>
382 |     <param>
383 |       <key>type</key>
384 |       <value>complex</value>
385 |     </param>
386 |     <param>
387 |       <key>title</key>
388 |       <value>FFT Plot</value>
389 |     </param>
390 |     <param>
391 |       <key>samp_rate</key>
392 |       <value>600</value>
393 |     </param>
394 |     <param>
395 |       <key>baseband_freq</key>
396 |       <value>0</value>
397 |     </param>
398 |     <param>
399 |       <key>y_per_div</key>
400 |       <value>10</value>
401 |     </param>
402 |     <param>
403 |       <key>y_divs</key>
404 |       <value>10</value>
405 |     </param>
406 |     <param>
407 |       <key>ref_level</key>
408 |       <value>0</value>
409 |     </param>
410 |     <param>
411 |       <key>ref_scale</key>
412 |       <value>2.0</value>
413 |     </param>
414 |     <param>
415 |       <key>fft_size</key>
416 |       <value>1024</value>
417 |     </param>
418 |     <param>
419 |       <key>fft_rate</key>
420 |       <value>15</value>
421 |     </param>
422 |     <param>
423 |       <key>peak_hold</key>
424 |       <value>False</value>
425 |     </param>
426 |     <param>
427 |       <key>average</key>
428 |       <value>False</value>
429 |     </param>
430 |     <param>
431 |       <key>avg_alpha</key>
432 |       <value>0</value>
433 |     </param>
434 |     <param>
435 |       <key>win</key>
436 |       <value>None</value>
437 |     </param>
438 |     <param>
439 |       <key>win_size</key>
440 |       <value></value>
441 |     </param>
442 |     <param>
443 |       <key>grid_pos</key>
444 |       <value></value>
445 |     </param>
446 |     <param>
447 |       <key>notebook</key>
448 |       <value></value>
449 |     </param>
450 |     <param>
451 |       <key>freqvar</key>
452 |       <value>None</value>
453 |     </param>
454 |     <param>
455 |       <key>affinity</key>
456 |       <value></value>
457 |     </param>
458 |     <param>
459 |       <key>_coordinate</key>
460 |       <value>(1060, 7)</value>
461 |     </param>
462 |     <param>
463 |       <key>_rotation</key>
464 |       <value>0</value>
465 |     </param>
466 |   </block>
467 |   <block>
468 |     <key>analog_pll_freqdet_cf</key>
469 |     <param>
470 |       <key>id</key>
471 |       <value>analog_pll_freqdet_cf_0</value>
472 |     </param>
473 |     <param>
474 |       <key>_enabled</key>
475 |       <value>True</value>
476 |     </param>
477 |     <param>
478 |       <key>w</key>
479 |       <value>200*2.0*pi/samp_rate</value>
480 |     </param>
481 |     <param>
482 |       <key>max_freq</key>
483 |       <value>260*2.0*pi/samp_rate</value>
484 |     </param>
485 |     <param>
486 |       <key>min_freq</key>
487 |       <value>60*2.0*pi/samp_rate</value>
488 |     </param>
489 |     <param>
490 |       <key>affinity</key>
491 |       <value></value>
492 |     </param>
493 |     <param>
494 |       <key>minoutbuf</key>
495 |       <value>0</value>
496 |     </param>
497 |     <param>
498 |       <key>_coordinate</key>
499 |       <value>(688, 249)</value>
500 |     </param>
501 |     <param>
502 |       <key>_rotation</key>
503 |       <value>0</value>
504 |     </param>
505 |   </block>
506 |   <block>
507 |     <key>blocks_keep_one_in_n</key>
508 |     <param>
509 |       <key>id</key>
510 |       <value>blocks_keep_one_in_n_0</value>
511 |     </param>
512 |     <param>
513 |       <key>_enabled</key>
514 |       <value>True</value>
515 |     </param>
516 |     <param>
517 |       <key>type</key>
518 |       <value>float</value>
519 |     </param>
520 |     <param>
521 |       <key>n</key>
522 |       <value>10</value>
523 |     </param>
524 |     <param>
525 |       <key>vlen</key>
526 |       <value>1</value>
527 |     </param>
528 |     <param>
529 |       <key>affinity</key>
530 |       <value></value>
531 |     </param>
532 |     <param>
533 |       <key>minoutbuf</key>
534 |       <value>0</value>
535 |     </param>
536 |     <param>
537 |       <key>_coordinate</key>
538 |       <value>(928, 267)</value>
539 |     </param>
540 |     <param>
541 |       <key>_rotation</key>
542 |       <value>0</value>
543 |     </param>
544 |   </block>
545 |   <block>
546 |     <key>blocks_moving_average_xx</key>
547 |     <param>
548 |       <key>id</key>
549 |       <value>blocks_moving_average_xx_0</value>
550 |     </param>
551 |     <param>
552 |       <key>_enabled</key>
553 |       <value>True</value>
554 |     </param>
555 |     <param>
556 |       <key>type</key>
557 |       <value>float</value>
558 |     </param>
559 |     <param>
560 |       <key>length</key>
561 |       <value>samp_rate/50</value>
562 |     </param>
563 |     <param>
564 |       <key>scale</key>
565 |       <value>25/pi</value>
566 |     </param>
567 |     <param>
568 |       <key>max_iter</key>
569 |       <value>200</value>
570 |     </param>
571 |     <param>
572 |       <key>affinity</key>
573 |       <value></value>
574 |     </param>
575 |     <param>
576 |       <key>minoutbuf</key>
577 |       <value>0</value>
578 |     </param>
579 |     <param>
580 |       <key>_coordinate</key>
581 |       <value>(709, 349)</value>
582 |     </param>
583 |     <param>
584 |       <key>_rotation</key>
585 |       <value>180</value>
586 |     </param>
587 |   </block>
588 |   <block>
589 |     <key>fractional_resampler_xx</key>
590 |     <param>
591 |       <key>id</key>
592 |       <value>fractional_resampler_xx_0</value>
593 |     </param>
594 |     <param>
595 |       <key>_enabled</key>
596 |       <value>False</value>
597 |     </param>
598 |     <param>
599 |       <key>type</key>
600 |       <value>complex</value>
601 |     </param>
602 |     <param>
603 |       <key>phase_shift</key>
604 |       <value>0</value>
605 |     </param>
606 |     <param>
607 |       <key>resamp_ratio</key>
608 |       <value>73.5</value>
609 |     </param>
610 |     <param>
611 |       <key>affinity</key>
612 |       <value></value>
613 |     </param>
614 |     <param>
615 |       <key>minoutbuf</key>
616 |       <value>0</value>
617 |     </param>
618 |     <param>
619 |       <key>_coordinate</key>
620 |       <value>(797, 72)</value>
621 |     </param>
622 |     <param>
623 |       <key>_rotation</key>
624 |       <value>0</value>
625 |     </param>
626 |   </block>
627 |   <connection>
628 |     <source_block_id>blocks_moving_average_xx_0</source_block_id>
629 |     <sink_block_id>wxgui_numbersink2_0</sink_block_id>
630 |     <source_key>0</source_key>
631 |     <sink_key>0</sink_key>
632 |   </connection>
633 |   <connection>
634 |     <source_block_id>blocks_float_to_complex_0</source_block_id>
635 |     <sink_block_id>band_pass_filter_0</sink_block_id>
636 |     <source_key>0</source_key>
637 |     <sink_key>0</sink_key>
638 |   </connection>
639 |   <connection>
640 |     <source_block_id>band_pass_filter_0</source_block_id>
641 |     <sink_block_id>analog_pll_freqdet_cf_0</sink_block_id>
642 |     <source_key>0</source_key>
643 |     <sink_key>0</sink_key>
644 |   </connection>
645 |   <connection>
646 |     <source_block_id>audio_source_0</source_block_id>
647 |     <sink_block_id>blocks_float_to_complex_0</sink_block_id>
648 |     <source_key>0</source_key>
649 |     <sink_key>0</sink_key>
650 |   </connection>
651 |   <connection>
652 |     <source_block_id>band_pass_filter_0</source_block_id>
653 |     <sink_block_id>fractional_resampler_xx_0</sink_block_id>
654 |     <source_key>0</source_key>
655 |     <sink_key>0</sink_key>
656 |   </connection>
657 |   <connection>
658 |     <source_block_id>fractional_resampler_xx_0</source_block_id>
659 |     <sink_block_id>wxgui_fftsink2_0</sink_block_id>
660 |     <source_key>0</source_key>
661 |     <sink_key>0</sink_key>
662 |   </connection>
663 |   <connection>
664 |     <source_block_id>blocks_moving_average_xx_0</source_block_id>
665 |     <sink_block_id>blocks_null_sink_0</sink_block_id>
666 |     <source_key>0</source_key>
667 |     <sink_key>0</sink_key>
668 |   </connection>
669 |   <connection>
670 |     <source_block_id>analog_pll_freqdet_cf_0</source_block_id>
671 |     <sink_block_id>blocks_keep_one_in_n_0</sink_block_id>
672 |     <source_key>0</source_key>
673 |     <sink_key>0</sink_key>
674 |   </connection>
675 |   <connection>
676 |     <source_block_id>blocks_keep_one_in_n_0</source_block_id>
677 |     <sink_block_id>blocks_moving_average_xx_0</sink_block_id>
678 |     <source_key>0</source_key>
679 |     <sink_key>0</sink_key>
680 |   </connection>
681 | </flow_graph>
682 | 


--------------------------------------------------------------------------------
/top_block.py:
--------------------------------------------------------------------------------
  1 | #!/usr/bin/env python
  2 | ##################################################
  3 | # Gnuradio Python Flow Graph
  4 | # Title: Top Block
  5 | # Generated: Tue Nov 19 23:21:43 2013
  6 | ##################################################
  7 | 
  8 | from gnuradio import analog
  9 | from gnuradio import audio
 10 | from gnuradio import blocks
 11 | from gnuradio import eng_notation
 12 | from gnuradio import filter
 13 | from gnuradio import gr
 14 | from gnuradio import wxgui
 15 | from gnuradio.eng_option import eng_option
 16 | from gnuradio.filter import firdes
 17 | from gnuradio.wxgui import numbersink2
 18 | from grc_gnuradio import wxgui as grc_wxgui
 19 | from math import pi
 20 | from optparse import OptionParser
 21 | import wx
 22 | 
 23 | class top_block(grc_wxgui.top_block_gui):
 24 | 
 25 |     def __init__(self):
 26 |         grc_wxgui.top_block_gui.__init__(self, title="Top Block")
 27 |         _icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
 28 |         self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
 29 | 
 30 |         ##################################################
 31 |         # Variables
 32 |         ##################################################
 33 |         self.samp_rate = samp_rate = 44100
 34 | 
 35 |         ##################################################
 36 |         # Blocks
 37 |         ##################################################
 38 |         self.wxgui_numbersink2_0 = numbersink2.number_sink_f(
 39 |         	self.GetWin(),
 40 |         	unit="Hz",
 41 |         	minval=50,
 42 |         	maxval=280,
 43 |         	factor=1,
 44 |         	decimal_places=2,
 45 |         	ref_level=0,
 46 |         	sample_rate=samp_rate,
 47 |         	number_rate=15,
 48 |         	average=False,
 49 |         	avg_alpha=None,
 50 |         	label="Number Plot",
 51 |         	peak_hold=False,
 52 |         	show_gauge=True,
 53 |         )
 54 |         self.Add(self.wxgui_numbersink2_0.win)
 55 |         self.blocks_moving_average_xx_0 = blocks.moving_average_ff(samp_rate/50, 25/pi, 200)
 56 |         self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_float*1, 10)
 57 |         self.blocks_float_to_complex_0 = blocks.float_to_complex(1)
 58 |         self.band_pass_filter_0 = filter.fir_filter_ccc(1, firdes.complex_band_pass(
 59 |         	1, samp_rate, 60, 255, 100, firdes.WIN_BLACKMAN, 6.76))
 60 |         self.audio_source_0 = audio.source(samp_rate, "default", True)
 61 |         self.analog_pll_freqdet_cf_0 = analog.pll_freqdet_cf(200*2.0*pi/samp_rate, 260*2.0*pi/samp_rate, 60*2.0*pi/samp_rate)
 62 | 
 63 |         ##################################################
 64 |         # Connections
 65 |         ##################################################
 66 |         self.connect((self.blocks_moving_average_xx_0, 0), (self.wxgui_numbersink2_0, 0))
 67 |         self.connect((self.blocks_float_to_complex_0, 0), (self.band_pass_filter_0, 0))
 68 |         self.connect((self.band_pass_filter_0, 0), (self.analog_pll_freqdet_cf_0, 0))
 69 |         self.connect((self.audio_source_0, 0), (self.blocks_float_to_complex_0, 0))
 70 |         self.connect((self.analog_pll_freqdet_cf_0, 0), (self.blocks_keep_one_in_n_0, 0))
 71 |         self.connect((self.blocks_keep_one_in_n_0, 0), (self.blocks_moving_average_xx_0, 0))
 72 | 
 73 | 
 74 | # QT sink close method reimplementation
 75 | 
 76 |     def get_samp_rate(self):
 77 |         return self.samp_rate
 78 | 
 79 |     def set_samp_rate(self, samp_rate):
 80 |         self.samp_rate = samp_rate
 81 |         self.band_pass_filter_0.set_taps(firdes.complex_band_pass(1, self.samp_rate, 60, 255, 100, firdes.WIN_BLACKMAN, 6.76))
 82 |         self.analog_pll_freqdet_cf_0.set_loop_bandwidth(200*2.0*pi/self.samp_rate)
 83 |         self.analog_pll_freqdet_cf_0.set_max_freq(260*2.0*pi/self.samp_rate)
 84 |         self.analog_pll_freqdet_cf_0.set_min_freq(60*2.0*pi/self.samp_rate)
 85 |         self.blocks_moving_average_xx_0.set_length_and_scale(self.samp_rate/50, 25/pi)
 86 | 
 87 | if __name__ == '__main__':
 88 |     import ctypes
 89 |     import os
 90 |     if os.name == 'posix':
 91 |         try:
 92 |             x11 = ctypes.cdll.LoadLibrary('libX11.so')
 93 |             x11.XInitThreads()
 94 |         except:
 95 |             print "Warning: failed to XInitThreads()"
 96 |     parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
 97 |     (options, args) = parser.parse_args()
 98 |     tb = top_block()
 99 |     tb.Start(True)
100 |     tb.Wait()
101 | 
102 | 


--------------------------------------------------------------------------------