(AudioScope.sh)
06150.sh

The most important file other than the script itself is 'waveform.raw' and it sits in a directory generated by the script of "$HOME"/Temp.

On the very first ever run the files below are created inside the "$HOME"/Temp also generated at the same time. Every rerun of the script tests for this file and if it exists these are not regenerated.
This means the script runs almost instantly from a restart. However if the script command "RESET" is used then this is the same as a very first start and these files are regenerated.

More information added to the Manual.

Quicktime Player capture mode is once again working in OSX 10.12.2 and 10.12.3, Sierra.

The only single byte file that is genuine is the 'dcdata.raw' file. All other single byte files are place-marker files only for extras that the script might need for all facilities.
'Arduino_9600.pde' for The Arduino Diecimila Board if used. To be used to program the board for use on this project.
'Untitled.m4a' for QUicktime Player cpature mode ONLY.
'pulsetest.sh' for use on a second machine with the '/dev/dsp' audio device to calibrate the correct polarity of a waveform displayed, the 'POLARITY' command.
'signed16bit.txt' for CygWin AND Windows SoundRecorder.exe capture mode ONLY.
'sweep.wav' and 'sweep.raw' for a swept andio frequency generator, from 4KHz to around 85Hz and back twice, the 'SWEEP' command.
'symmetricalwave.wav' for Quicktime Player capture for the frequency counter.

Code:

Last login: Fri Feb 17 14:52:09 on ttys000
AMIGA:amiga~> ls -l Temp
total 1360
-rw-r--r--  1 amiga  staff  48000 17 Feb 14:50 0000000000.BIN
-rwxr-xr-x  1 amiga  staff    609 17 Feb 14:50 1KHz-Test.sh
-rw-rw-rw-  1 amiga  staff      1 17 Feb 14:50 Arduino_9600.pde
-rw-rw-rw-@ 1 amiga  staff      1 17 Feb 14:51 Untitled.m4a
-rw-r--r--  1 amiga  staff    253 17 Feb 14:50 VERT_BAT.BAT
-rwxr-xr-x  1 amiga  staff    329 17 Feb 14:50 VERT_DSP.sh
-rwxr-xr-x  1 amiga  staff    370 17 Feb 14:50 VERT_SOX.sh
-rw-r--r--  1 amiga  staff      1 17 Feb 14:50 dcdata.raw
-rw-r--r--  1 amiga  staff  65580 17 Feb 14:50 pulse1.wav
-rw-r--r--  1 amiga  staff  65580 17 Feb 14:50 pulse2.wav
-rwxr-xr-x  1 amiga  staff      1 17 Feb 14:50 pulsetest.sh
-rw-r--r--  1 amiga  staff  48000 17 Feb 14:50 sample.raw
-rw-r--r--  1 amiga  staff      1 17 Feb 14:50 signed16bit.txt
-rw-r--r--  1 amiga  staff  65536 17 Feb 14:50 sinewave.raw
-rw-r--r--  1 amiga  staff  65580 17 Feb 14:50 sinewave.wav
-rw-r--r--  1 amiga  staff   8000 17 Feb 14:50 squarewave.raw
-rw-r--r--  1 amiga  staff      1 17 Feb 14:50 sweep.raw
-rw-r--r--  1 amiga  staff      1 17 Feb 14:50 sweep.wav
-rw-r--r--  1 amiga  staff  80000 17 Feb 14:50 sweeper.raw
-rw-r--r--  1 amiga  staff   8000 17 Feb 14:50 symmetricalwave.raw
-rw-r--r--  1 amiga  staff      1 17 Feb 14:50 symmetricalwave.wav
-rw-r--r--  1 amiga  staff  48000 17 Feb 14:51 waveform.raw
-rw-r--r--  1 amiga  staff  99948 17 Feb 14:51 waveform.wav
AMIGA:amiga~> _

Script file statistics:-

# Total Lines=4566.
# Blank Lines=28.
# Code Lines=2129.
# Comments=2409, (including the builtin Manual).
# Filesize=196479 bytes.

The attached image is a whistle into the internal microphone using Quicktime Player as the capture source.

Enjoy...