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OSX Sierra transparent shell audio sampler.

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Old Unix and Linux 11-13-2016
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OSX Sierra transparent shell audio sampler.

Well after the transparent QuickTime Player means of capture for OSX 10.7.x became broken in at least Yosemite I decided to persevere with a version of command line capture for OSX 10.12.x.

A derivative of this DEMO is now inside AudioScope.sh to give my MBP and iMac a means of capturing an audio signal using a virgin Sierra install.

As I run my machines as a standard non-admin user then the following occurs...
On the very first run only you will get Untitled1.jpg followed by an admin and admin password window finally followed Untitled2.jpg.

It is obvious what you need to do but you will not need it again once set.

The DEMO code has NO error correction so beware. If you want to test it then use the internal mic as the source. Make sure you set up the mic levels to suit your needs.

Code:
#!/bin/sh
# ./sample.sh <number_of_seconds>
#
# This DEMO shell script uses a virgin OSX Sierra install only, nothing else is required.
# The conversion for this DEMO is mono, 8 bit, unsigned integer at 48000 sps but it is
# easy to convert to just about anything, 'man afconvert'...
#
# This saves a sample '/tmp/Untitled.m4a' and is converted to '/tmp/Untitled.wav' file.
#
# './sample.sh 6' allows for 1 second startup and 5 seconds of recording.
#
# Use the internal microphone as a test.
seconds="$1"
osascript << AppleSampler
tell application "QuickTime Player"
	activate
	close (every document whose name contains "Untitled") saving no
	set savePath to "Macintosh HD:tmp:" & "Untitled.m4a"
	set recording to new audio recording
	set visible of front window to false
	start recording
	delay "$seconds"
	stop recording
	export document "Untitled" in file savePath using settings preset "Audio Only"
	close (every document whose name contains "Untitled") saving no
	tell application "System Events" to click menu item "Hide Export Progress" of menu "Window" of menu bar 1 of process "QuickTime Player"
	quit
end tell
AppleSampler
# Example of conversion to WAVE file.
afconvert -f 'WAVE' -c 1 -d UI8@48000 /tmp/Untitled.m4a /tmp/Untitled.wav
ls -l /tmp/Untitled.*
# Playback both files.
afplay /tmp/Untitled.m4a
sleep 1
afplay /tmp/Untitled.wav
exit 0

Attached Thumbnails
OSX Sierra transparent shell audio sampler.-untitled1-jpg   OSX Sierra transparent shell audio sampler.-untitled2-jpg  
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Old Unix and Linux 12-31-2016
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Well as all of regulars on here now know the code in the OP is broken as of OSX Sierra 10.12.2. It works fine on 10.12.0 and 10.12.1 but the latest version of Sierra broke the code.
See here...
Root access in OSX 10.12.2.
...for more details.
This code is a workaround for the error generated in the above URL.
The important part is this...

Code:
> /"$mypath"/Untitled.m4a
chmod 666 /"$mypath"/Untitled.m4a

...inside the function. It can be outside the function but fails on AudioScope.sh if it is. I have absolutely no idea why! AudioScope.sh now captures again using QT.
Here is the revised code to counteract the error in the above URL.
It works for me and I hope for others too.
The Applescript section has been altered to allow for time delays in program startup and initial setup before taking a recording. There is a very small amount of error checking that defaults to roughly a 1 second capture.
This fudge has taken me ages to solve and has taught me a lot about Apple and their attitude towards security. I can't blame them but it is a RPITA having to do workarounds.

Code:
#!/bin/sh
# Usage:- [./]AUDIO_CAPTURE.sh <number_of_seconds_from_1_upwards>
#
# This DEMO shell script uses a virgin OSX Sierra install only, nothing else is required.
# The conversion for this DEMO is mono, 8 bit, unsigned integer at 48000 sps but it is
# easy to convert to just about anything, 'man afconvert'...
#
# This creates a sample which is then saved to '/"$mypath"/Untitled.m4a' which is then converted
# to '/"$mypath"/Untitled.wav' file. Both formats are then played using 'afplay'.
#
# From the current directory, './AUDIO_CAPTURE.sh 5' gives about 5 seconds of recording.
#
# Use the internal built in microphone as a test.

# Time for the recording.
seconds="$1"
# Some very basic error checking.
if [ "$seconds" = "" ] || [ "$seconds" -le "1" ]
then
	seconds=1
fi

# 'mypath' should be in Applescript format, NOT POSIX format.
# E.G. 'Users:myhome:Desktop'. There is no need for leading and trailing colons - see below.
# This could be a command line second argument but is not given '$2' here.
mypath='tmp'

SAMPLE()
{
> /"$mypath"/Untitled.m4a
chmod 666 /"$mypath"/Untitled.m4a
osascript << AppleSampler
tell application "QuickTime Player"
	activate
	set savePath to "Macintosh HD:" & "$mypath" & ":Untitled.m4a"
	set recording to new audio recording
	set visible of front window to false
	delay 3
	start recording
	delay "$1"
	stop recording
	export document "Untitled" in file savePath using settings preset "Audio Only"
	close (every document whose name contains "Untitled") saving no
	tell application "System Events" to click menu item "Hide Export Progress" of menu "Window" of menu bar 1 of process "QuickTime Player"
	-- quit
end tell
AppleSampler
# 'wait' added for fullness only.
wait
}

# Use the function to create a _background_ recording.
SAMPLE "$seconds"

# Example of conversion to a WAVE file.
afconvert -f 'WAVE' -c 1 -d UI8@48000 /"$mypath"/Untitled.m4a /"$mypath"/Untitled.wav
ls -l /"$mypath"/Untitled.*

# Playback both files.
afplay /"$mypath"/Untitled.m4a
sleep 1
afplay /"$mypath"/Untitled.wav
exit 0

EDIT:-

Just comment out the 'quit' part in the Applescript section to remove the annoying opening and closing of QT on the dock...

Last edited by wisecracker; 12-31-2016 at 09:43 AM.. Reason: See above.
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Old Unix and Linux 01-01-2017
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As an addendum to this thread I enabled 'csrutil' again and it has NOT affected this capture mode so all is looking good.

I am going to consider it solved for the time being but not enable the 'solved' _tag_ at this point.

Bazza.
    #4  
Old Unix and Linux 02-05-2017
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Now tested on the latest OSX 10.12.3 Sierra on a(n) MBP and iMac.
And it is still working - WOOHOO.
The code now has some error checking and commented out code for a "path" option instead of just "tmp" alone.
It is bash centric but should work fine on ksh(93)...

Code:
#!/bin/bash
# Usage:- [./]AUDIO_CAPTURE.sh <number_of_seconds_from_1_upwards><CR>
#
# This DEMO shell script uses a virgin OSX Sierra install only, nothing else is required.
# The conversion for this DEMO is mono, 8 bit, unsigned integer at 48000 sps but it is
# easy to convert to just about anything, 'man afconvert'...
#
# This creates a sample which is then saved to '/"$POSIXpath"/Untitled.m4a' which is then converted
# to '/"$POSIXpath"/Untitled.wav' file. Both formats are then played using 'afplay'.
#
# From the current directory, './AUDIO_CAPTURE.sh 5<CR>' gives about 5 seconds of recording.
#
# Use the internal built in microphone as a test.

# Time for the recording.
seconds="$1"
# Some very basic error checking.
case $seconds in
	''|*[!0-9]*)	seconds=1 ;;
esac
if [ "$seconds" = "" ] || [ "$seconds" -le "1" ]
then
	seconds=1
fi
POSIXpath="tmp"

# 'POSIXpath' should be in POSIX format.
# E.G. 'Users/myhome/Desktop'. There is no need for leading and trailing backslashes - see below.
# This could be a command line second argument but is NOT given '$2' in this DEMO.
# When the section below is uncommented...
# Usage:- [./]AUDIO_CAPTURE.sh <number_of_seconds_from_1_upwards> [your/path/to]<CR>
# Where [your/path/to] is optional and defaults to "tmp".
#
# POSIXpath=$2
# Error check for directory existence.
# if [ ! -d "/$POSIXpath/" ]
# then
#	POSIXpath="tmp"
# fi

# Convert to AppleScript format for this code.
OSXpath="${POSIXpath////:}"

SAMPLE()
{
: > /"$POSIXpath"/Untitled.m4a
chmod 666 /"$POSIXpath"/Untitled.m4a
osascript << AppleSampler
tell application "QuickTime Player"
	activate
	set savePath to "Macintosh HD:" & "$OSXpath" & ":Untitled.m4a"
	set recording to new audio recording
	set visible of front window to false
	delay 2
	start recording
	delay "$1"
	stop recording
	export document "Untitled" in file savePath using settings preset "Audio Only"
	close (every document whose name contains "Untitled") saving no
	tell application "System Events" to click menu item "Hide Export Progress" of menu "Window" of menu bar 1 of process "QuickTime Player"
	delay 1
	quit
end tell
AppleSampler
# 'wait' added for fullness only.
wait
}

# Use the function to create a _background_ recording.
SAMPLE "$seconds"

# Example of conversion to a WAVE file.
afconvert -f 'WAVE' -c 1 -d UI8@48000 /"$POSIXpath"/Untitled.m4a /"$POSIXpath"/Untitled.wav
ls -l /"$POSIXpath"/Untitled.*

# Playback both files.
afplay /"$POSIXpath"/Untitled.m4a
sleep 1
afplay /"$POSIXpath"/Untitled.wav
exit 0

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