Basically DoP is native DSD wrapped in a PCM packet for enhanced compatibility with soft/hardware. There is no difference in SQ between either method but DoP is far less bandwidth efficient (roughly 50% overhead is added). Most USB transports go up to 384KHz PCM which translates to max DoP of DSD128. Some, like the iFi Micro's, go up to 768KHz which means DSD256 is possible.
The only reason I can think one would choose DoP over native DSD is lack of support for the latter.
I have no experience with MACs so I can't tell if DoP is the only way to play DSD on them. Sorry.
The only reason I can think one would choose DoP over native DSD is lack of support for the latter.
I have no experience with MACs so I can't tell if DoP is the only way to play DSD on them. Sorry.
Thanks Jackal, that has clarified it a bit.
Is native DSD propriertory to the Amanero board ?
cheers
Hi guys - just wondering if anyone has come up with a way of determining the DSD sample rate coming out of the Amanero? I'm using a AK4490 chip in software mode driven by a Amanero combo 384. I use pin 7 on the Amanero to switch the AK4490 to DSD mode which works well. My problem is the AK4490 has no auto detection for the DSD sample rate so if I set it to 1x it plays 1x DSD fine but 2x DSD produces only static.
I notice in the Amanero firmware tool, I2C action setup menu there is references to the DSD sample rate there so that may be a possibility. I'm using a Arduino style micro to control everything so it is easy to change the DSD rate just need a control signal telling it the correct sample rate. Any suggestions much appreciated. Thanks.
I notice in the Amanero firmware tool, I2C action setup menu there is references to the DSD sample rate there so that may be a possibility. I'm using a Arduino style micro to control everything so it is easy to change the DSD rate just need a control signal telling it the correct sample rate. Any suggestions much appreciated. Thanks.
Pin 16 on the header is a DSD64/128 flag (open drain) you can use. 0=DSD64 and 1=DSD128 😉
cheers
Thanks for that - I must have read the Amanero data sheet a dozen times but missed it!
Domenico has just given me some helpful info too.
Cheers
Domenico has just given me some helpful info too.
Cheers
AFAIK that pin is deprecated. There is a new scheme for indicating DSD rates.
This is the new indicator system:
F2/F1
0/0 -> DSD64
0/1 -> DSD128
1/0 -> DSD256
1/1 -> DSD512
You will notice that it now supports up to DSD512.
I have implemented such a display system in my Arduino-based sampling rate indicator. It works like a charm.
This is the new indicator system:
F2/F1
0/0 -> DSD64
0/1 -> DSD128
1/0 -> DSD256
1/1 -> DSD512
You will notice that it now supports up to DSD512.
I have implemented such a display system in my Arduino-based sampling rate indicator. It works like a charm.
Wow you guys are fantastic!
Thanks for all the help.
Just a query. From the data sheet pins f0 > f3 are used for indication of PCM sample rate.
So are you saying in DSD mode pins f2/f1 are then indicating the DSD rate?
Is there an updated data sheet showing this?
Thanks for all the help.
Just a query. From the data sheet pins f0 > f3 are used for indication of PCM sample rate.
So are you saying in DSD mode pins f2/f1 are then indicating the DSD rate?
Is there an updated data sheet showing this?
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Yes I've seen that one already thanks. No DSD512 stuff although native DSD512 stuff appears to be very rare.
cheers
Thanks Jameso
Can't get enough of this stuff although to get me by I just converted a PCM file to DSD512 using the demo version of AUI CONVERTER 48x44
AuI ConverteR 48x44 - HiEnd audio converter ISO DFF DSF WAV FLAC AIFF
cheers
I know that Lampi and AMI Musik use the Amanero USB interface, but what other devices use it?
No Lock
Hi All,
Just put together the latest Soekris dam1021 DAC with Amanero I2S USB adapter. Not getting a lock.
Using this web page as a build reference- https://hifiduino.wordpress.com/
- J2 Voltages are ok. Using adjustable voltage regulator set to 10v dc.
- Supplied 3.3v from Amanero I2S board to DAM1021.
- Audio output taken from raw L&R on dam1021.
- Music server Daphile software recognizes the Amanero combo board and Amanero is able to be selected in the Daphile software.
- Default auto-select of source in use.
- Tried 3 different USB cables, all non-audiophile type, probably USB 1.1.
- Tried StraighWire USB cable of better build quality.
- Tried 16 bit and 192 bit music tracks.
Does the lock happen only when it detects a track or the dam1021 detects a source?
- Added dedicated regulated 3.3v to dam1021 isolated side. Still no lock.
Twisted all pairs. No lock.
Locked for a few minute on Windows (with Windows driver). Lock is eventually lost.
Music tracks played faster, as if sped up. How's that even possible?
I've read that Amanero board isn't the best fit for Soekris 1021. Anyone have this experience? Can anyone recommend another USB to I2S adpater board? DIYinHK??
Is it possible the firmware on Amanero needs updating? This board is the latest from Soekris.
Any help would be appreciated.
Thanks,
Vince
Hi All,
Just put together the latest Soekris dam1021 DAC with Amanero I2S USB adapter. Not getting a lock.
Using this web page as a build reference- https://hifiduino.wordpress.com/
- J2 Voltages are ok. Using adjustable voltage regulator set to 10v dc.
- Supplied 3.3v from Amanero I2S board to DAM1021.
- Audio output taken from raw L&R on dam1021.
- Music server Daphile software recognizes the Amanero combo board and Amanero is able to be selected in the Daphile software.
- Default auto-select of source in use.
- Tried 3 different USB cables, all non-audiophile type, probably USB 1.1.
- Tried StraighWire USB cable of better build quality.
- Tried 16 bit and 192 bit music tracks.
Does the lock happen only when it detects a track or the dam1021 detects a source?
- Added dedicated regulated 3.3v to dam1021 isolated side. Still no lock.
Twisted all pairs. No lock.
Locked for a few minute on Windows (with Windows driver). Lock is eventually lost.
Music tracks played faster, as if sped up. How's that even possible?
I've read that Amanero board isn't the best fit for Soekris 1021. Anyone have this experience? Can anyone recommend another USB to I2S adpater board? DIYinHK??
Is it possible the firmware on Amanero needs updating? This board is the latest from Soekris.
Any help would be appreciated.
Thanks,
Vince
Hi.
Amanero works fine with DAM board. Please post pics of your setup, especially the connections between Amanero and Dam.
Regards
Vince, check that conecctor marked with arrow are insert correcly.
Perharps, the wires are too long, but your setup is basically same than mine.
http://www.diyaudio.com/forums/swap...021-01-0-01-resistor-version.html#post4289831
subir imagen
Perharps, the wires are too long, but your setup is basically same than mine.
http://www.diyaudio.com/forums/swap...021-01-0-01-resistor-version.html#post4289831
An externally hosted image should be here but it was not working when we last tested it.
subir imagen
Smanz, thanks for checking it out.
I was thinking it could be two things. The toroid transformer is 6.7 to 9 amp capable. Is it possible it's generating a large field? Possibly injecting noise?
Other concern is the wiring is stranded. Maybe solid core thin gauge like used in CAT 5 cable would be better suited for digital signals?
Wires are under 6 inches (150mm) or so. Soren at soekris said that length is fine if twisted.
Thanks
Vince
I was thinking it could be two things. The toroid transformer is 6.7 to 9 amp capable. Is it possible it's generating a large field? Possibly injecting noise?
Other concern is the wiring is stranded. Maybe solid core thin gauge like used in CAT 5 cable would be better suited for digital signals?
Wires are under 6 inches (150mm) or so. Soren at soekris said that length is fine if twisted.
Thanks
Vince