[linux-audio-user] Recording from SPDIF with Audiophile

davidrclark at earthlink.net davidrclark at earthlink.net
Fri Jan 2 16:57:08 EST 2004

<lau at hippie-online.de> HippiE wrote:

> Is this also true if you do not use the mixer? What a nonsense! :-(

If you use arecord in any way, this reduction to 8.3% of the level occurs
if you use ICE1712 for the envy24-based chips.  Yes, it is very "nonsensical"
for a 2-channel card, but the envy24 chips were developed for multi-channel
(such as 12) inputs, so to be safe, they reduce the volume to 8.3% for
each input.  There should be a way to modify the ttable settings --- and
I'm sure there is --- but I don't know where or how to do this myself.
This occurs with or without envy24control, and with or without amixer 
settings.  All mixer settings of 100% give you 8.3% AS RECORDED, even if
your input level is peaked (as loud as possible) with ICE1712 default
routings.  So you're losing 4 bits (20 bit recording from a 24-bit card!).

As I mentioned previously, qarecord works fine.  100% is 100%.  I'm not
sure about ecasound.  I'll have to check that out.  I am also interested
in command-line recording so that I can batch-process audio.  I don't
want to have to point-click for each recording.  (But qarecord is pretty
nice!  I wish I could set it to "mono.")

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