> I've been long annoyed by alsa-tools' envy24control (*) lack of
> peak-level indication in it's metering, and the non-implementation of
> its "Reset Peaks" button:
>
https://bugzilla.redhat.com/show_bug.cgi?id=602903
>
> I've fixed that annoyance. Now, a small white line appears above the
> highest level on each meter, and can be reset via "Reset Peaks"
> button.
>
> Original source:
>
http://git.alsa-project.org/?p=alsa-tools.git;a=blob_plain;f=envy24contr...
>levelmeters.c;hb=HEAD Patch:
>
http://nielsmayer.com/npm/602903.patch
>
> To run this version of envy24control grab the most recent stable release (
>
ftp://ftp.alsa-project.org/pub/tools/alsa-tools-1.0.23.tar.bz2 ) or git
> pull from trunk of the "alsa-tools" project (
>
http://alsa-project.org/main/index.php/GIT_Server ).
>
> After unpacking and assuming you've got the patch in ~/602903.patch do:
> >> cd alsa-tools-1.0.23
> >> cat ~/602903.patch | patch -p1
>
> it should give message "patching file envy24control/levelmeters.c" ...
> follow the directions to compile alsa-tools....
>
> Can whoever's in charge of these things commit this change "upstream"
> and get it to propagate to the distros?
> Alternately, give me commit access and I'll do it myself, if people
> agree this patch is worth having.
>
> Next steps:
>
> (1) Think about building-in meter ballistics from Fons Adriaensen's
> jkmeter (
>
http://www.kokkinizita.net/linuxaudio/downloads/jkmeter-0.4.0.tar.bz2 ).
> Which helps implent Bob Katz' "K System" (
>
http://www.digido.com/level-practices-part-2-includes-the-k-system.html
> ). Although it probably most makes sense to implement such metering on
> the main "digital mixer" meter of envy24control, if it's not too
> inefficient, I'd want it available on all meters, despite the warning
> from Fons (
http://old.nabble.com/First-release-of-jkmeter-td18798950.html
> ).
>
> > This is the type of meter you want for live recording,
> > mixing and mastering. It probably makes no sense to
> > use it on all tracks of a DAW, where keeping digital
> > level within limits is the main purpose of metering.
>
> (2) Fix
https://bugzilla.redhat.com/show_bug.cgi?id=602900 which
> causes 'envy24control' to crash when given "-D" argument.
> and behave incorrectly when given a correct non-numeric name for an
> audio device: e.g.
>
> >> envy24control --card M66
> >> invalid card type (driver is USB-Audio)
> >> envy24control --card M66 --device M66
> >> Segmentation fault (core dumped)
>
> (3) Apply more reasonable defaults and automatically size to correct
>
> dimensions. I use, for example:
> >> envy24control --card 2 --outputs 4 --input 4 --pcm_output 8
> >> --view_spdif_playback --midichannel 1 --midienhanced --window_width 1275
> >> --tall_eq_mixer_heights 1 &
>
> (4) Add midi output, in addition to midi input, which would monitor
> the hardware peak metering from the ice1712
> ("amixer -c M66 cget iface=PCM,name='Multi Track Peak',numid=45")
> and output a MIDI note-on on the corresponding MIDI channel whenever a
> specified threshold value was exceeded. This could be used to
> implement "automatic gain control" in association with the
> midi-controllable ADC gain provided by envy24control.
>
> Niels
>
http://nielsmayer.com
>
> PS: (*)
http://alsa.opensrc.org/index.php/Envy24control
> Cards supported by this fix:
> * M Audio Delta 1010
> * M Audio Delta 1010LT
> * M Audio Delta DiO 2496
> * M Audio Delta 66
> * M Audio Delta 44
> * M Audio Delta 410
> * M Audio Audiophile 2496
> * TerraTec EWS 88MT
> * TerraTec EWS 88D
> * TerraTec EWX 24/96
> * TerraTec DMX 6Fire
> * TerraTec Phase 88
> * Hoontech SoundTrack DSP 24
> * Hoontech SoundTrack DSP 24 Value
> * Hoontech SoundTrack DSP 24 Media 7.1
> * Event Electronics, EZ8
> * Digigram VX442
> * Lionstracs, Mediastaton
> * Terrasoniq TS 88
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