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Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

CM6631 usb audio interface .... any good ?
CM6631 usb audio interface .... any good ?
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Old 23rd March 2018, 07:19 AM   #661
chermann is offline chermann  Austria
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Hi
just to keep the board in correct operation.
the drivers name is:
USB2.0 High-Speed True HD Audio


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Old 23rd March 2018, 11:23 AM   #662
chermann is offline chermann  Austria
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Quote:
Originally Posted by chermann View Post
Hi
just to keep the board in correct operation.
the drivers name is:
USB2.0 High-Speed True HD Audio


and Jplay is reporting :
Asio driver for C-Media USB DAc (64)

so i think its ok?

kr
chris
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Old 23rd March 2018, 11:53 AM   #663
chermann is offline chermann  Austria
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Location: Vienna
Quote:
Originally Posted by olo111 View Post
Where we cay buy 6631A?
my proposal to buy = with case !
Aliexpress.com : HIFI CM6631A Digitale schnittstelle 32/24Bit 192 Karat Soundkarte USB zu I2S/SPDIF Coaxial Ausgang Unterstutzung Connect Decoder Upgrade DAC von verlasslichen interface-Lieferanten auf Hi IC Store kaufen
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Old 24th March 2018, 08:54 PM   #664
chermann is offline chermann  Austria
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Good Evening..

after burning approx 40 hours) in the board over RCA analog out to my amp i want to give you my impression -(compared to my gustard A20H):

this board is sounding well after the burn in phase, its terible until 15 aren´t left.
the sound is not squeezy and long listening is possible.the DAC ES9023P has a 2V output, so its fine to go in some line in of an amp directly...fine !

the bass is ok but somethimes in low bass its pushing to hard, for me its sound like the tone have to go out without sense to the others.
mid and voices are fine and at the veyr end of the high i miss some coolness. so it is not stressy but at high hats its not really clear and the board is not give enough time to swing out.
The room is 1m meter on left and right side smaller and the deepness is not gooing far back....and sideway behind the speakers

never the less this board cost about 27 euros so it is a fine little sounding DAC. lets hear after 100hours or more.

test over tidal (44.1khZ) - jplay - laptop- usb cable- DAC

titel -interpret-album

chilled cream - blank& jones - relax edition 4
armband - steffano Bollani - Gleda
Beat - Tingvall Trio - Beat (at CM66631A its sound strange -like L&R are changed or out of phase...i triple check the connection..... but ....no idea what here happend....?

Madrigal - Marialy Pacheco - Introducing
Don´t let me be missunderstood - Lyambiko - Saffronia special edition
Celestial Echo - Malia & Boris blank - Convergence
Movín - Gregory Porter - Liquit Spirit

chris

Last edited by chermann; 24th March 2018 at 08:59 PM.
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Old 25th March 2018, 05:21 PM   #665
natmanz is offline natmanz
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Is it possible to buy just the CM6631 chip without a board in 10 or less quantities? I don't see it listed on Digikey or Mouser.

I'm in the process of designing a new receiver board for my setup. Right now I use the PCM2706C for USB input, but it looks like the CM6631 would allow for SPDIF input without needing a separate chip. Looking at the SDK it seems that it can be programmed to route the SPDIF in to I2S out when USB in isn't active.
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Old 25th March 2018, 06:04 PM   #666
Kuba_eM is offline Kuba_eM  Poland
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Location: Warsaw
Quote:
Originally Posted by natmanz View Post
Is it possible to buy just the CM6631 chip without a board in 10 or less quantities? I don't see it listed on Digikey or Mouser.
They are on Aliexpress but there the purchase of the same chips can be risky, but who knows?
__________________
Best regards,
Kuba
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Old 26th March 2018, 03:33 AM   #667
tdtsai is offline tdtsai  Taiwan
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Hi
No it can not loop SPDIF IN to I2S Out. Because you can not choose SPDIF In as master clock. It will has data lose if you loop SPDIF In to I2S out.
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Old 26th March 2018, 05:39 AM   #668
chermann is offline chermann  Austria
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Location: Vienna
hi Guys

what is your proposal to mod this board:

1 caps, which one and what should i choose

2 Voltage regulator is AMS1117 3.3V regulator with AP2114? which case is the correct one?

3 optical to sharp GP1FAV31RK0F
optical is not existing in at my board and i do not use optical

4 is it possible to mod the es9023P with something?


thx
chris
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Old 17th April 2018, 01:10 AM   #669
kenvow is offline kenvow  Japan
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Hi tdtsai:
Thank you for providing lots of information.
I will try implementing firmware based on these.
Best regarts.
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Old 19th April 2018, 07:38 PM   #670
3lite is online now 3lite
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Click the image to open in full size.

It's the same dimension as Amanero

The UAC class is selectable and it can support following sampling rates:

UAC 2.0:

Click the image to open in full size.

UAC 1.0:

Click the image to open in full size.

The last one is supported even on Windows XP without any additional drivers.
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