On the Mac it’s not an option. Most manufacturers don’t provide custom drivers, so it’s DoP only.
You said that through Roon it’s playing DSD256 as DSD128? That’s also not normal. Why it downsamples?
My DAC would have to play 768kHz PCM in order to play DSD 256 over PCM1.1–it only plays up to PCM 384, thus it downsamples to DSD128.
The fact that the DAC doesn’t play 768kHz PCM it still doesn’t mean that the USB interface can’t accept that rate in DoP and unpack it. It’s a question of implementation. The interface itself offers ample bandwidth. That’s why it makes sense to investigate this with the manufacturer.
I solved the problem by digging out my Windows 10 HP laptop, installing the USB driver for the DAC in in Oppo, which plays 256 DSD, plugging my HP into it, and bingo, it worked! Wow, that DSD file sounds amazing.
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It says you set up Audirvana not mqa dac…
You put pcm over dsd 1.1 in dac Audirvana prefs?
I don’t know how auto detection works, but you can override both. Set MQA to MQA Decoder and DSD to DoP 1.1 and you’ll be good.
Are you referring to me?
I didn’t ask anything of it BUT I n oticed what you did. I shall post what the debug now says.
As I said I am not a techy. I made changes but don’t know why or what to. So it is best to show you what I did and you can maybe tell me what I should do?
btw it plays the flac back at 192khz even thio the file says it’s 48khz MQA.
Here is the debug with changes. I do not know if I changed the MQA correctly nor the DSD.
Audirvana Mac Version 3.5.33 (3563)
macOS 10.15.4 with 8192MB RAM
Registered to Colin Andersson-Hamill
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: OFF
Effects plugins ACTIVE in offline mode
AU plugin #0: Effect - Apple AUGraphicEQ ()
AU plugin #1: None
AU plugin #2: None
AU plugin #3: None
UPSAMPLING:
SoX
SoX filter parameters
Bandwidth at 0dB = 99.5
Filter max length = 30000
Anti-aliasing = 100
Phase = 100
AUDIO VOLUME:
Max allowed volume: 89.0003
Replay Gain: by album
SW volume control: ON
LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Users/knitman2/Music/iTunes/iTunes Media/Music
iTunes/Music library synchronization: last synchronized on Sat Feb 15 17:31:14 2020
Library database path: /Users/knitman2/Music/iTunes/iTunes Media/Music/AudirvanaPlusDatabaseV2.sqlite
ACTIVE STREAMING SERVICES
=================== AUDIO DEVICE ========================
CoreAudio audio path, buffer I/O frame size: 512
Max. memory for audio buffers: 5120MB
Local Audio Engine:
Exclusive access: Enabled
Integer mode: Enabled
Preferred device:
8300CD USB Interface
Model UID:8300CD USB Interface:2622:0041
UID:AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
Active Sample Rate: 384kHz
Hog Mode is off
Bridge settings:
Sample rate limitation: none
Sample rate switching latency: none
Limit bitdepth to 24bit: OFF
Mute during sample rate change: ON
Selected device:
Local audio device
ID 0x57 8300CD USB Interface Manufacturer:Audiolab
Model UID:8300CD USB Interface:2622:0041 UID:AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
8 available sample rates up to 384000Hz
44100
48000
88200
96000
176400
192000
352800
384000
Audio buffer frame size : 116 to 4096 frames
Current I/O buffer frame size : 512
Volume Control
Physical: No
Virtual: No
MQA capability
Auto-detect MQA devices: Yes
Not a MQA device, user set to MQA Decoder
DSD capability: DSD via PCM 1.1
Device audio channels
Preferred stereo channels L:1 R:2
Channel bitmap: Ox3, layout:
Channel 0 mapped to 0
Channel 1 mapped to 1
Audio channels in use
Number of channels: 2
Use as stereo device only: No
Simple stereo device: Yes
1 output streams:
Number of active channels: 2, in 1 stream(s)
Channel #0 :Stream 0 channel 0
Channel #1 :Stream 0 channel 1
Stream ID 0x58 2 channels starting at 1
24 virtual formats:
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 384kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 352.8kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 192kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 176.4kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 96kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 88.2kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 48kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 44.1kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
32 physical formats
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
Local devices found : 2
Device #0: ID 0x57 8300CD USB Interface Manufacturer: Audiolab Model UID: 8300CD USB Interface:2622:0041 UID: AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
Device #1: ID 0x4b MacBook Pro Speakers Manufacturer: Apple Inc. Model UID: Speaker UID: BuiltInSpeakerDevice
UPnP devices found : 1
Device #0: ID 0x0 RX-A3080 D8B5E8 UID: uuid:9ab0c000-f668-11de-9976-946ab0d8b5e8 Location: http://192.168.1.6:49154/MediaRenderer/desc.xml
yes i was reffering to you 
you are upsampling with the sox resampler… put it at deactivated if you want the song to be played like they are… i don’t have mqa and don’t know how this thing should output…
another thing i see is that you software volume is at 89%… i think it should be at 100% for DSD playing… not sure…
That’s MQA thing, so it’s working.
It won’t allow me to just thank you. It is good to know that MQA is working.
However, having recently been reading articles about MQA it would seem to be another attempt to get money for nothing. In other words MQA is not the improvement in sound its says. I admit to not being able to hear anything different. I DO hear a difference with 192khz as does my husband who being a trained Opera singer (bass) ought to know. But then to be frank my ordinary cd 44.1khz are very pleasing. I guess because I am fortunate to have a very good sound system.
Back to MQA: I was under the impressions it was a recording of what was heard in the studio without processing.
Thank you.I made changes as suggested. I have not bought any DSD files as I don’t know enough about them. I have read that they are no better than my 192khz files. The only DSD files I have were obtained by recording a cd in DSD which I would not think is a real DSD file. I do know each file is very large-a few hundred mb per track.
Her is the new Debug info. I at least understand some of it.
Audirvana Mac Version 3.5.33 (3563)
macOS 10.15.4 with 8192MB RAM
Registered to
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: ON
Effects plugins ACTIVE in offline mode
AU plugin #0: Effect - Apple AUGraphicEQ ()
AU plugin #1: None
AU plugin #2: None
AU plugin #3: None
UPSAMPLING:
SoX not in use
SoX filter parameters
Bandwidth at 0dB = 99.5
Filter max length = 30000
Anti-aliasing = 100
Phase = 100
AUDIO VOLUME:
Max allowed volume: 89.0003
Replay Gain: by album
SW volume control: ON
LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Users/knitman2/Music/iTunes/iTunes Media/Music
iTunes/Music library synchronization: last synchronized on Sat Feb 15 17:31:14 2020
Library database path: /Users/knitman2/Music/iTunes/iTunes Media/Music/AudirvanaPlusDatabaseV2.sqlite
ACTIVE STREAMING SERVICES
=================== AUDIO DEVICE ========================
CoreAudio audio path, buffer I/O frame size: 512
Max. memory for audio buffers: 5120MB
Local Audio Engine:
Exclusive access: Enabled
Integer mode: Enabled
Preferred device:
8300CD USB Interface
Model UID:8300CD USB Interface:2622:0041
UID:AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
Active Sample Rate: 384kHz
Hog Mode is off
Bridge settings:
Sample rate limitation: none
Sample rate switching latency: none
Limit bitdepth to 24bit: OFF
Mute during sample rate change: ON
Selected device:
Local audio device
ID 0x57 8300CD USB Interface Manufacturer:Audiolab
Model UID:8300CD USB Interface:2622:0041 UID:AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
8 available sample rates up to 384000Hz
44100
48000
88200
96000
176400
192000
352800
384000
Audio buffer frame size : 116 to 4096 frames
Current I/O buffer frame size : 512
Volume Control
Physical: No
Virtual: No
MQA capability
Auto-detect MQA devices: Yes
Not a MQA device, user set to MQA Decoder
DSD capability: DSD via PCM 1.1
Device audio channels
Preferred stereo channels L:1 R:2
Channel bitmap: Ox3, layout:
Channel 0 mapped to 0
Channel 1 mapped to 1
Audio channels in use
Number of channels: 2
Use as stereo device only: No
Simple stereo device: Yes
1 output streams:
Number of active channels: 2, in 1 stream(s)
Channel #0 :Stream 0 channel 0
Channel #1 :Stream 0 channel 1
Stream ID 0x58 2 channels starting at 1
24 virtual formats:
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 384kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 352.8kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 192kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 176.4kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 96kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 88.2kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 48kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 44.1kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
32 physical formats
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 384kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 352.8kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 176.4kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 44.1kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz
Local devices found : 2
Device #0: ID 0x57 8300CD USB Interface Manufacturer: Audiolab Model UID: 8300CD USB Interface:2622:0041 UID: AppleUSBAudioEngine:Audiolab:8300CD USB Interface:0215:1
Device #1: ID 0x4b MacBook Pro Speakers Manufacturer: Apple Inc. Model UID: Speaker UID: BuiltInSpeakerDevice
UPnP devices found : 2
Device #0: ID 0x0 RX-A3080 D8B5E8 UID: uuid:9ab0c000-f668-11de-9976-946ab0d8b5e8
You can try dsd files for free here:
You’ll also find the MQA files and PCM files in various resolutions, all created from the same source. This gives you the chance to compare apples to apples, oranges to oranges.
I am very confused. I got a message saying the community, I assume they mean other readers, complained that my posts were spam.
How was that conclusion come to? What did it appear that I was selling?
I was merely trying to ascertain answers to peculiar things this program does, lijke tell me my DAC doesn’t play MQA or DSD files when it odes. Was I not supposed to mention the make and model of the DAC?
Was it the Debug info that was gther problem?
Not only am I left still confused about the meaning of some of the things Audirvana tells me but now feel, despite trying not to, somewhat offended that when reaching out for help, I am considered to be a spammer.
None of this makes sense to me.
Maybe because too much long debug or text from new user 
Hello @Knitman, this is an automatic system form the forum that marked one of your responses as a spam since you put your debug info in two response and the system identified it as spam.
I felt I had good reason. My debug info showed errors. I corrected them as advised and wanted to see if I had done so correctly. Now I am not sure what I can do.
So rather than show the debug info, I can say this:
Thank you to the person who posted the 2l link.(What a shame they no longer exist.) I downloaded a DSD64 in 5.1 surround. It played beautifully and Audirvana reported that it was playing a DSD64 and other info.
There must be something wrong with me. At age 61 I am beginning to enjoy classical music. Maybe it is to do with brain damage. (Something I am quite serious about. I am unable to walk and my ability to communicate can be impaired and I sometimes write nonsense. So please be aware of this. My head was my father’s favourite football and my brain pays the price. Not my spirit. That is content and happy and enjoys every second of the life I have. I just point this out so you are forewarned if I post something incomprehensible. It will make sense to me, if not you.)
I downloaded a DSD64 (5.1) file and it played beautifully. Such a shame 2l has closed. Do you know a source for obtaining DSD files?
Thank you kindly.
The link That I posted is still Up there…
You can find dsd downloads (not free …)here :
Prostudiomasters https://www.prostudiomasters.com
here you can find an index of links to DSD sites https://dsd-guide.com/where-can-you-find-dsd-music-downloads#.XoXsuy9aaL4
and here http://www.findhdmusic.com/album-search/?incl_genre_130=1
if you search for a specific album you’ll be able to find which site, if any, offers dsd downloads