This a major upload and includes the limited Audio Frequency Spectrum _Analyser_ to 4KHz.
This has a relative _calibration_, not an absolute one.
This Spec-An is NOT available for CygWin as there is no access to at least Python 2.7.x in a default CygWin install.
OSX 10.12.x and above specific creating of a new terminal added.
Many thanks to 'xbin' for the code for this.
Also many thanks to much of Corona688's additions and following of this, much of which is inside this script in various modified formats.
File listings are as such:-
Code:
The "$HOME" drawer.
-rw-r--r-- 1 amiga staff 20715 20 May 13:40 AudioScope.Circuits
-rw-r--r-- 1 amiga staff 307 20 May 13:40 AudioScope.Config
-rw-r--r-- 1 amiga staff 115248 20 May 13:40 AudioScope.Manual
-rwxr-xr-x 1 amiga staff 217121 20 May 12:52 AudioScope.sh
-rw-r--r-- 1 amiga staff 6319 20 May 13:40 AudioScope_Quick_Start.Notes
The "$HOME"/Temp drawer.
0000000000.BIN pulse[1].wav sweep.raw
1KHz-Test.sh pulse[2].wav sweep.wav
Arduino_9600.pde pulsetest.sh sweeper.raw
Untitled.m4a sample.raw symmetricalwave.raw
VERT_BAT.BAT signed16bit.txt symmetricalwave.wav
VERT_DSP.sh sinewave.raw waveform.raw
VERT_SOX.sh sinewave.wav waveform.wav
dcdata.raw squarewave.raw
The /tmp/drawer for the spectrum display.
(From the manual.)
# SPECAN<CR>, This is the built in AF spectrum analyser that has an upper limit
# of 4KHz. This is experimental and generates a stand alone 'bash' script that
# includes a stand alone Python script to do the FFT heavy lifting. It uses the
# built in frequency counter to capture an external signal, otherwise it will
# use AudioScope's capture and convert it to a 'WAV' file. The files generated
# are saved into the '/tmp/' drawer and not permanantly kept. If you want to
# extract these files they are:-
#
# -rw-r--r-- 1 amiga wheel 914 27 Apr 19:29 FFT_WAV.py
# -rwxr-xr-x 1 amiga wheel 4705 27 Apr 19:29 Spec_An.sh
# -rw-r--r-- 1 amiga wheel **** 27 Apr 19:29 bash_array
# -rw-r--r-- 1 amiga wheel 48000 27 Apr 19:29 symmetricalwave.raw
# -rw-r--r-- 1 amiga wheel 8044 27 Apr 19:29 symmetricalwave.wav
# The '****' file length varies per the command 'SPECAN' call.
#
# The only important ones are 'FFT_WAV.py' and 'Spec_An.sh'.
# The files 'Spec_An.sh' and FFT_WAV.py are licenced as GPL2.
# A typical coloured disply looks something like this:-
#
# ++-------[ $VER Spec_An.sh_(C)2017_B.Walker_GPL2_Licence.]-------++
# 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++100
# || | | | | | | | ||
# 90 ++ | | | | | | | ++ 90
# R || | | | | | | | ||
# E 80 ++ | | | | | | | ++ 80
# L || * | | | | | | | ||
# A 70 ++ * | | | | | | | ++ 70
# T || * * | | | | | | | ||
# I 60 ++ * * | | | | | | | ++ 60
# V || * * | * | | | | | ||
# E 50 ++ * * | ** * | | | | | ++ 50
# || * * * ** ** | | | | | ||
# L 40 ++ * ** * * ** ** | | | | | ++ 40
# E || * ** ** * ** ** * ** * * | | | | ||
# V 30 ++ **** ** * ** ** * ** **** * | | | | ++ 30
# E || ******* ******* * ** **** ** | | | | ||
# L 20 ++ ******* ********* ** ******* | ** * | | ++ 20
#Log10(X)|| ***************************** ***** ***** * *| **** ** ||
# 10 ++ *********************************************** ******* ** ***+ 10
# ||****************************************************************|
# 0 +*****************************************************************+ 0
#FREQ Hz +0------500----1000----1500----2000----2500----3000----3500----4000
# Press <CR> to continue:-
Now working on true RMS for any random signal now, and it looks as though AWK might just do it.
Many more things like Average Voltage, LF frequency using the Chopper and much more.
The stats for the current incarnation.
# Total Lines=5045.
# Blank Lines=45.
# Code Lines=2334.
# Comments=2666, (including the builtin Manual).
# Filesize=217121 bytes.
The images are a whistle into the internal mic using SOX as the prime mover, zoomed in 8x.
A psectral display of the same whistle.
In this current state 'SPECAN<CR>' gives you the option of looking at the proper capture or an external one, but only to 4KHz
The power of the *NIX style shell, utilities and terminal!
Has anything like this ever been done before I wonder?
We have a system running ssh. When a user logs in, they do not get the project they are assigned to (they run under "system"). I verify the project using the command "ps -e -o user,pid,ppid,args,project". If you do a "su - username", the user does get the project they are assigned to (and all... (2 Replies)
A new project was posted on your project board.
Project title: Bash Shell Tutoring
Estimated Budget:
$50/hr
Start date:
Immediately
Required skills:
Linux, Bash, Shell, UNIX
I work as a datawarehouse designer and developer.
Although I usually stick to the role of an analyst,... (0 Replies)
Hi Admin and Staff...
Thanks for hosting AudioScope.sh on this site. I have had the biggest surprise of my life today.
This months issue of the UK Linux magazine "Linux Format" have done a small piece on the project.
Issue April 2014, LXF 182, page 65...
This I never expected and I... (1 Reply)
Hi all...
Has _below_ ever been done in UNIX shell scripting before?
(I have done this easily in Python but this is using purely the shell.)
The DEMO version IS built and has been tested.
Pre-amble...
I now need at least one control pulse for the AudioScope.sh when in PURELY audio I/O mode,... (2 Replies)
Development machine:- Standard MBP 13 inch, OSX 10.7.5...
GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin11)
Copyright (C) 2007 Free Software Foundation, Inc.
Scenario:- Audio capture for AudioScope.sh for CygWin without ANY third party installs.
I am trying my hardest to get a... (6 Replies)
Hi guys...
Well I have entered an area of partial insnity... ;o)
Below is a photo of the 'ALTDC' board for AudioScope.sh...
I have decided to incorporate all three methods for obtaining DC into this MBP via the MIC input.
1) VFO.
2) CHOPPER.
3) COUNTER.
The controller for the COUNTER... (9 Replies)
Boy oh boy, with only a MONO mic input to use AudioScope gets much more difficult when the ALTDC board is included.
It needs, so far, two hits at the MIC input with a single hit at the HEADPHONE audio output.
The first at the highest practical resolution for the AC component and the second... (0 Replies)
Hi all...
Apologies for any typos...
For those intersted in the AudioScope the next construction is finished.
I have not been totally idle but working out the hard stuff to be able to be very simple to build.
It is a single transistor simple timer that lasts for about 1.2 to 1.8 seconds.... (2 Replies)
Using AudioScope.sh on Ubuntu 17.04 from a live DVD disc I came across an error.
Consider the code below it is a MUCH shortened version of the KEYBOARD input in AudioScope.
#!/bin/bash
bash --version
uname -a
status=0
KEYBOARD()
{
read -r -p "Enter QUIT or EXIT to quit:- " kbinput
if ||... (11 Replies)