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Old 2nd September 2010, 06:46 PM   #31
diytoon is offline diytoon  Belgium
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Quote:
Originally Posted by anbello View Post
I bought one of this board from ebay (see attachment), it's based on Tenor TE7022L and i tried it with Ubuntu Linux 10.04.

Ciao
Andrea
hi I did exact the same as you...everything higher then 48000 gives me distortion...tried s16le, s24le, s32le...always the same.
now it is playing very nice @s24le/48000

tried it in windows 7 as well...same thing everything higher then 48000 distortion...

I think it is the teradak....

I have a brandnew computer since last week (HP HPE320 with optical out and internal (lousy) hd audio...) but I can manage to let it play in ubuntu and windows 7 @24/96000...

I think I will look for a real soundcard with optical out @192000...

sugestions?


kind regards,

Tony
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Old 10th September 2010, 01:58 PM   #32
anbello is offline anbello  Italy
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Quote:
Originally Posted by diytoon View Post
hi I did exact the same as you...everything higher then 48000 gives me distortion...tried s16le, s24le, s32le...always the same.
now it is playing very nice @s24le/48000

tried it in windows 7 as well...same thing everything higher then 48000 distortion...

I think it is the teradak....

I have a brandnew computer since last week (HP HPE320 with optical out and internal (lousy) hd audio...) but I can manage to let it play in ubuntu and windows 7 @24/96000...

I think I will look for a real soundcard with optical out @192000...

sugestions?


kind regards,

Tony
Hi,
maybe there was a misunderstanding due to my bad English knowledge but i don't ear distortion at 96000/S24_3LE.
I only have a little doubt about the bit perfectness of the device 0 of this card and till now i had no time to test this, when i will do it i will let you know.

Ciao
Andrea
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Old 14th September 2010, 03:04 PM   #33
anbello is offline anbello  Italy
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Hi,
i built a little coax -> optical spdif interface to test my card and i can say that it is bit perfect for 48/16 and 96/16.
I have tested it with "aplay" on the card under test and "arecord" on another card with optical spdif in, then i compared the original wav file with the recorded one with "wavdiff" (http://axel-sommerfeldt.de/wavdiff001123.zip).
Obviously this test gives bit perfect results only with the PCM volume control on "alsamixer" for the card under test at 100%.
I couldn't test the card with 48/24 and 96/24 wav because wavdiff works only with 16 bit wav files.
I would like to know if someone knows another program to compare wav files (similar to wavdiff - it handles files with different length and different silence offset on the head) that can cope with 24 wav files.

Ciao
Andrea
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Old 14th September 2010, 05:13 PM   #34
phofman is offline phofman  Czech Republic
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Andrea,

I played with testing bit-perfectness quite a lot and could not find any automated tool. wavdiff was OK (for 16 bits), but it could not align wavs with minor distortions at the beginning (not all recorded tracks from spdif-in started with zero samples). I ended up truncating and aligning the two tracks in audacity (with a bit of practice it does not take more than two minutes). Subsequent comparison - subtracting the aligned wavs is straightforward in SoX.

If you are fine with wavdiff, its C code is nice and clean, it should not be difficult to modify. Perhaps
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Old 15th September 2010, 07:01 AM   #35
anbello is offline anbello  Italy
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Hi phofman,
Thanks for your replay.

I will go on with bit-perfectness testing following your hints in two way:
1) Short term: Audacity editing + SoX.
2) Long term: i will try to modify wavdiff for 24 bit.

Ciao
Andrea
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Old 19th September 2010, 12:02 AM   #36
anbello is offline anbello  Italy
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OK bit perfect also @ 96/24
tested with aplay, arecord, audacity editing and sox subtract and stat:
sox -V -m outgoing.wav -v -1 incoming.wav -n stat

Ciao
Andrea
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Old 7th November 2011, 08:10 AM   #37
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Let's bump this thread...
Did someone come up with any substantial mods for this device ?
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Old 22nd December 2011, 03:32 PM   #38
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Teralink X2 clock mod. with Tentlabs XO
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