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Full Discussion: AudioScope...
The Lounge What is on Your Mind? AudioScope... Post 302948152 by wisecracker on Friday 26th of June 2015 07:26:51 AM
Old 06-26-2015
AudioScope...

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 for the DC component, IF any.

This means I have to record the AC component first, using the Y amp, then send a trigger pulse to a monostable to hold a relay to switch the input to the DC board AND the output of the DC board to the input of the Y amp.

Simple enough but what started out as a basic project as a learning tool for both myself and kids has turned into something that shell scripting and a(n) MBP 13" laptop using AF I/O was not designed for.

The builtin counter measures much better, on average, than my quoted 0.1% accuracy against my pro-gear here so, although it will be long-winded to use this will be used in the setting up and calibrating the 'ALTDC' board.

I will upload a block diagram of what I am aiming for in the not too distant future...

Without you big guns chipping in with your help this project would have never gotten off of the ground...

Thanks guys...

Bazza...
 

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BRP-PACU(1)						      General Commands Manual						       BRP-PACU(1)

NAME
brp-pacu - dual fft live audio analysis program SYNOPSIS
brp-pacu DESCRIPTION
This manual page documents briefly the brp-pacu program. This manual page was written for the Debian distribution because the original program does not have a manual page. brp-pacu is an audio analysis tool to configure any sound system with an equalizer. It compares the output of the system to the input of the system and allows you to use this data to perform final equalization by matching the results with actual DSP/EQ. Channel 1 is the output of the system we are observing (measured), channel 2 is the input (reference). You also need a decent calibrated omnidrectional microphone (reasonably flat 20Hz-20kHz) and either a USB-Preamp like the 2-channel M-Audio, or a mixer with a 30dB pad or so going into the laptop mic input. No Pad is necessary if you are lucky enough to have a laptop or PC with a line input. The headphone out will have the pink noise. brp-pacu works through Jack Audio Connection Kit. OPTIONS
This program takes no arguments SEE ALSO
jackd(1). AUTHOR
This manual page was written by Jaromir Mike <mira.mikes@seznam.cz>, for the Debian project (but may be used by others). February 28, 2011 BRP-PACU(1)
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