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    <p>Some time ago I wrote some of the steps</p> <ul> <li><code>Record audio input on a n% gate threshold</code></li> </ul> <p>A: Start a Boolean variable type for "Silence" and you can calculate <a href="http://en.wikipedia.org/wiki/Root_mean_square" rel="nofollow noreferrer">RMS</a> to decide if Silence is true or False, Set one RMS Threshold</p> <ul> <li><code>stop recording after so many seconds of silence</code></li> </ul> <p>A: Do you need calculate one timeout, for it get the Frame Rate, Chunk Size and how many seconds do you want, to calculate your timeout make (FrameRate / chunk * Max_Seconds) </p> <ul> <li><code>keep recording for so many seconds after audio</code></li> </ul> <p>A: If Silence is false == (RMS > Threshold) get the last chunk of data of audio (LastBlock) and just keep record :-) </p> <ul> <li><code>Phase 2: input data into MySQL database to search the recordings</code></li> </ul> <p>A: This step is up to you</p> <p>Source code:</p> <pre><code>import pyaudio import math import struct import wave #Assuming Energy threshold upper than 30 dB Threshold = 30 SHORT_NORMALIZE = (1.0/32768.0) chunk = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 16000 swidth = 2 Max_Seconds = 10 TimeoutSignal=((RATE / chunk * Max_Seconds) + 2) silence = True FileNameTmp = '/home/Recodings/2013/8/23/12-33.wav' Time=0 all =[] def GetStream(chunk): return stream.read(chunk) def rms(frame): count = len(frame)/swidth format = "%dh"%(count) shorts = struct.unpack( format, frame ) sum_squares = 0.0 for sample in shorts: n = sample * SHORT_NORMALIZE sum_squares += n*n rms = math.pow(sum_squares/count,0.5); return rms * 1000 def WriteSpeech(WriteData): stream.stop_stream() stream.close() p.terminate() wf = wave.open(FileNameTmp, 'wb') wf.setnchannels(CHANNELS) wf.setsampwidth(p.get_sample_size(FORMAT)) wf.setframerate(RATE) wf.writeframes(WriteData) wf.close() def KeepRecord(TimeoutSignal, LastBlock): all.append(LastBlock) for i in range(0, TimeoutSignal): try: data = GetStream(chunk) except: continue #I chage here (new Ident) all.append(data) print "end record after timeout"; data = ''.join(all) print "write to File"; WriteSpeech(data) silence = True Time=0 listen(silence,Time) def listen(silence,Time): print "waiting for Speech" while silence: try: input = GetStream(chunk) except: continue rms_value = rms(input) if (rms_value &gt; Threshold): silence=False LastBlock=input print "hello ederwander I'm Recording...." KeepRecord(TimeoutSignal, LastBlock) Time = Time + 1 if (Time &gt; TimeoutSignal): print "Time Out No Speech Detected" sys.exit() p = pyaudio.PyAudio() stream = p.open(format = FORMAT, channels = CHANNELS, rate = RATE, input = True, output = True, frames_per_buffer = chunk) listen(silence,Time) </code></pre>
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    1. POPython record audio on detected sound
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    1. COOk I am getting somewhere, but I need the program to run indefenantly and create the files it's self at the moment I am getting a file not found on ederwander's code. the program is detecting the sound correctly..... do we have to have a time out for the program or can we just time out that recording and then start listening again. Sorry getting a bit tied up in a knot here
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    2. COOk I'm getting no errors now and have a file output working correctly. the problem is I only get a 1 sec recording of the trigger audio, I need it to record until silence again and then write to file and then start listening again.
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    3. COIndent correctly this line "all.append(data)", see update!
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