Flac Health Check was Audio CD Health Check
 

Just to say that I've now released a new version that should have fixed the
quirk. So this should now scan all the audio data in the flac file being
examined.

Jim

On 25 Apr, wrote:

I've now produced a RO program that does a statistical analysis on the
samples in flac format audio files.
It can be obtained from

http://www.audiomisc.co.uk/software/index.html

The current version has one quirk due to the way it reads the flac file
in 5-sec chunks.
[snip]

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Audio CD Health Check
 

Just to say that I've updated my Audio CD 'Health Check' program and it now
does an FFT on the probability distribution of sample values. This makes it
easier to diagnose the cause of various periodic flaws in the audio data.
In some cases I've been able to work out what gain change was applied
(without dither or shaping) that fouled up the results.

As before, the source code (in 'C') is provided with the package and can be
obtained via

http://www.audiomisc.co.uk/software/index.html

I'll add the new ability to the Flac check program, then start on Linux
versions which others should find easier to port to Windows/Mac if they
wish.

That said, the Flac program should be relatively easy to port as it relies
on the standard 'flac' utility rather than do its own flac - LPCM
recovery.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Flac Health Check was Audio CD Health Check
 

For anyone interested, this is to let people know that I've now released
improved versions of my two audio 'Health Check' programs. Along with some
minor improvements they also now both can do 'interval spectra' of the
statistical distribuition of how often sample values occur. This makes it
easier to spot/diagnose some kinds of flaws in ADCs used for recordings or
faults in the way the audio was 'mastered'.

As before, the programs (with source code) can be found via

http://www.audiomisc.co.uk/software/index.html

I'm now happy that the programs do the full analysis I wish, so my next
step will be to create Linux versions, again with source code so anyone
familiar with GCC 'C' can port/use the methods on other computer platforms
if they wish.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Flac Health Check was Audio CD Health Check
 

I've just put up a new webpage to show some examples of the results you can
get by using !Flac_HealthCheck. In particular it illustrates how you can
tell a 'well made' 96/24 flac file from a 'poorly' made one that may be no
better than a CD (or worse). You can find the page at

http://www.audiomisc.co.uk/HFN/HealthCheck/Flac.html

although if you've not read

http://www.audiomisc.co.uk/HFN/HealthCheck/CD.html

I'd recommend reading that first as I avoided duplicating some of the
explanations of the analysis process.

I'm currently working on Linux versions of the programs. (More
specifically, learning how to use libcdio and paranoia libraries to rip
audio from CDs. as basis for the Cd Health Check process on Linux.)

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Flac Health Check was Audio CD Health Check
 

I've updated the programs again. Mostly minor bugfixes, but I have made one
change to the Linux Flac_HealthCheck to allow the user to choose where its
temporary working files are stored during analysis. (I use this to put them
on ram, which speeds things up quite noticably.)

As before, the programs (with source code) can be found at

http://www.audiomisc.co.uk/software/index.html

And examples of results, explanations, etc, can be found on

http://www.audiomisc.co.uk/HFN/HealthCheck/CD.html

http://www.audiomisc.co.uk/HFN/HealthCheck/Flac.html

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html