Settings for DSD256 playback on Mytek Liberty DAC

Hi, I’m new here and do hope not to repeat already known issue. I’ve just configured the following system to play HiRez files: Mac mini (2018 - 3.0GHz 6-core Intel Core i5, 8GB RAM) with Audirvana Studio trial software and Mytek Liberty DAC with firmware version 1.35 (manual: https://mytek.audio/web/content/2130?unique=6aa8ac4c2933572905b7bee3f340d5a6f73a8040&download=true) interconnected via USB port. I downloaded some DSD files with various resolutions (64/128/256). Everything works fine with DoP 1.1 option selected in Audirvana except DSD256 format playback, which gets converted into PCM. To me all such tracks are loosing a bit of brightness and punch. One can listen to jazz with pleasure but for instance rock bands sound somehow not convincing (a subjective judgement of course).
Below is debug info taken while playing DSD256.
Is there anything I could improve in Audirvana settings to enjoy pure DSD256 format end-to-end?
Thank you!

==========

Audirvana Studio 1.14.0 (11400)

macOS Version 12.6 (Build 21G115) with 8GB physical RAM

Connected account of : Przemyslaw

SIGNAL PROCESSING:

Polarity Inversion:
	Globally: OFF
	Per track: ON
Effects plugins NOT ACTIVE

UPSAMPLING:
r8brain not in use
r8brain filter parameters
Bandwidth = 99.5%
Stop band attenuation 218dB
Phase linear

AUDIO VOLUME:
Max allowed volume: 100
Replay Gain: None
SW volume control: OFF

LIBRARY SETTINGS:
Sync list: 2 folders
AUTO: /Users/przemek/Documents/Muzyka HD
AUTO: /Users/przemek/Music
iTunes/Music library synchronization: last synchronized on Tue Sep 20 16:51:40 2022

Library database path: /Users/przemek/Library/Application Support/Audirvana/AudirvanaDatabase.sqlite

Remote Control server:
Listening on 127.0.0.1 on port 49872

ACTIVE STREAMING SERVICES

=================== AUDIO DEVICE ========================

CoreAudio audio path, buffer I/O frame size: 512

Max. memory for audio buffers: 5120MB
Exclusive access: Enabled
Integer mode: Enabled

Preferred device:
MYTEK DIGITAL LIBERTY DAC
Model UID:Liberty DAC:25CE:001E
UID:AppleUSBAudioEngine:Mytek Digital:Liberty DAC:HEM006499:1

Currently playing in Integer Mode:
Device: 2ch Non-mixable linear PCM Interleaved 32bits little endian Signed Integer, 8 bytes per frame 352.8kHz

Active Sample Rate: 352.8kHz
Hog Mode is on

Bridge settings:
Sample rate limitation: none
Sample rate switching latency: none
Limit bitdepth to 24bit: OFF
Mute during sample rate change: OFF

Selected device:
Local audio device
ID 0x4e Liberty DAC
Manufacturer: Mytek Digital
Model Name: Mytek Digital Liberty DAC
Model UID: Liberty DAC:25CE:001E
UID: AppleUSBAudioEngine:Mytek Digital:Liberty DAC:HEM006499:1

8 available sample rates up to 384000Hz
44100
48000
88200
96000
176400
192000
352800
384000
Audio buffer frame size : 14 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 not MQA
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 0x4f 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 32 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 32 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

32 physical formats
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 384kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 352.8kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 192kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 176.4kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 96kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 88.2kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 48kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 44.1kHz
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 Non-mixable linear PCM Interleaved 32 little endian Signed Integer 384kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 352.8kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 192kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 176.4kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 32 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

Local devices found : 2
Device #0: ID 0x4e Liberty DAC Manufacturer: Mytek Digital Model UID: Liberty DAC:25CE:001E UID: AppleUSBAudioEngine:Mytek Digital:Liberty DAC:HEM006499:1 Model Name: Mytek Digital Liberty DAC
Device #1: ID 0x48 Głośniki (Mac mini) Manufacturer: Apple Inc. Model UID: Speaker UID: BuiltInSpeakerDevice Model Name: Apple Inc. Głośniki (Mac mini)

UPnP devices found : 0

… and for DSD128 Audirvana config info looks as follows in the attachment …

Did you check if there is a driver for Mac to go to DSD256 ?

Here using Oppo 205, DSD 256 files play but with small interruptions.
This already happened with Audirvana 3.5 and the same with Origin.
But I think the problem is the DAC, because testing with another DAC that also accepts DSD, it worked perfectly.
I also use a Mac mini 2018 with an I5 processor and 8Gb of memory, exclusively for audio.

I see in the specs of your Mytec DAC that it can go to max. DSD256. On a Mac via DoP only half of that rate is possible (due to limitations of DoP and bandwith via PCM). DSD can only be played to a maximum of DSD128 to your DAC in your case. This is not a shortcoming of Audirvana, but a limitation of DoP.

You need a DAC which goes to DSD512 and than you can play DSD256 via DoP.

The only way you can play DSD256 with your Mytek DAC is on a Windows PC with an ASIO driver. On a Mac this is not possible.

Here is a link to the DoP standard (bit technical) but maybe you can do something with it:
DoP open Standard | DSD-Guide.com

1 Like

Exactly, the other DAC I tested was up to DSD512.

1 Like

Thank you! Now it is totally clear. I haven’t thought about the limitation in the particular DoP processing. By the way, a newbe question: Will the DoP algorithm be improved over time you think, so one day it may respond to my DAC specs? There are DoP versions 1.0 and 1.1 - visibly some kind of progress. Therefore, can we imagine one day the next version handling DD256 end-to-end as it happens with ASIO driver on WinOS?

What you need is a DAC that supports 705.6kHz (max 768kHz) and DSD256 then the DoP 1.1 carrier will deliver DSD256.

:notes: :eye: :headphones: :eye: :notes:

No need to revise… DoP 1.1 delivers the DSDxxx bit-stream, perfectly… It is just a means of transmission and is extracted in the DAC.

Thank you once again, what a great site with quick and comprehencive advice!
I’ll stick to DSD128 files for a while then, that’s also a bit cheaper…
All the best, P.