[PlanetCCRMA] MAudio - the same wav in Windows and Linux sound different

mArukqs marukas@hardcore.lt
Tue Nov 22 14:21:01 2005

All this stuff happens with analog outputs - the problem is not related to
SPDIF devices.

1) The easiest way to control "Deemphasis" is to use alsamixer - other
mixers like gnome volume control does not show this option. Possible
values are 33kHz, 44.1kHz, 48kHz.

2) I tried +4db, consumer and -10db controls for analog output on oss. It
can be easily heard that in alsa my M-Audio Audiophile 2496 always runs in
-10db mode. In consumer mode soundcard exposed overcompression problems in
my recording (please listen to the example - it sounds not overcompressed
in Linux, but in Windows it sounds like pumping even in LOW VOLUMES)

I believe that on a single system you can master a record which sound
nice, but if there is a bug in a driver then on the other audiosystems you
records can sound wrong, f.e. there are chances of applying wrong eqs
while mastering.

Have you tried to compare the sound in oss or windows driver?

Here is the few second demo wav:

Please try to listen this file both in windows and linux - I am 99% sure
that you will easily find a difference if you have good reference monitors
or headphones.


> Well, I'm questioning this from theory rather than experience, as I
> haven't
> actually tried the Delta 1010 I've got with Linux. The 66 I had worked
> wonderfully with it, though - to the point that I seriously question any
> major sound issues (I didn't take any scopes to the stuff, but my Tannoys
> and my ears were very pleased.). At any rate, I'd love some clarification
> on
> this:
> My understanding of the manual is that the Deemphasis is simply a status
> bit, used to tell devices further down the spdif chain that signal has had
> preemphasis applied, and should be decoded by them. I don't think the
> M-Audio cards actually apply any pre-emphasis themselves - they simply
> offer
> the ability to mark a stream as encoded.
> What are you running your spdif into? Perhaps you're hearing a difference
> in
> its decoding/converting quality based on its reaction to different
> emphasis
> flags in the streams rather than any changes occuring within the
> box/m-audio
> card.
> On 11/22/05, mArukqs <marukas@hardcore.lt> wrote:
>> I always had a bad feeling that the records made in Linux sound
>> different
>> in Windows.
>> Try to change this setting to various values - you will hear the BIG
>> difference. It is very sad that recording which were sounding so bright
>> in
>> Linux on other audio systems sound dull, sharp and ugly :/
> What values are available?
> How does it sound different?
> Looking forward to clarification. Thanks for bringing this up!
> --
> dan@towndowner.com dan@burntpossum.com daneasley@gmail.com
> http://towndowner.com http://burntpossum.com