Record sound

Record sound is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Record sound (mono 16-bit PCM) into an integer array.

PicoLisp

<lang PicoLisp>(in '(rec -q -c1 -tu16 - trim 0 2) # Record 2 seconds

  (make
     (while (rd 2)
        (link @) ) ) )</lang>

Output:

-> (16767 19071 17279 ... 5503 9343 14719)  # 96000 numbers

Python

<lang python>import pyaudio

chunk = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 44100

p = pyaudio.PyAudio()

stream = p.open(format = FORMAT,

               channels = CHANNELS,
               rate = RATE,
               input = True,
               frames_per_buffer = chunk)

data = stream.read(chunk) print [ord(i) for i in data]</lang>

Tcl

Library: Snack

<lang tcl>package require sound

1. Helper to do a responsive wait

proc delay t {after $t {set ::doneDelay ok}; vwait ::doneDelay}

1. Make an in-memory recording object

set recording [snack::sound -encoding "Lin16" -rate 44100 -channels 1]

1. Set it doing the recording, wait for a second, and stop

$recording record -append true delay 1000 $recording stop

1. Convert the internal buffer to viewable numbers, and print them out

binary scan [$recording data -byteorder littleEndian] s* words puts [join $words ", "]

1. Destroy the recording object

$recording destroy</lang>