I just received an SMSL PO100 AK DAC and I have strange behavior with Audirvana Studio 2.4.0 on macmini (late 2012). Let me explain. firstly, the DAC is automatically recognized by Audirvana, no problem on this side. Now suppose I play 4 music files from a Tidal playlist, the first is a FLAC, the 2nd is an MQA and the 3rd and 4th are FLAC again. Well, when playing the 3rd file, the green MQA light stays on, both on the application and on the DAC, same thing with the 4th song and so on, until I quit and restart the 'application.
Do you think this is normal? Thanks for your help.
Regards
Malik
Hi @Malik,
Interesting, can you send us a copy of the “Debug Info” when you have this issue? You can get it in Audirvana Settings>My account
Note: By clicking on the Debug Info button, Audirvana automatically copies all its content, all you have to do is paste it in response to this message
Please find attached the behavior of Audirvana When i select automatic detection from Audirvana (note that in this case My DAC displays Blue MQA indicator witch is “MQA Studio” according to the manufacturer.
When i deselect this option and choose the option MQA decoder, the green button with MQA disappears on the bottom right side on Audirvana and on the DAC the MQA indicator turns green, which corresponds to the “MQA” option for the DAC.
I suppose as mentioned in the DAC settings that Some DACs are not correctly recognized by Audirvana.
Please give me your opinion on this situation.
Note:Please find here the debug info for this session:
Audirvana Studio 2.4.0 (20400)
macOS 10.15.7 with 16GB physical RAM
Connected account of : XXXXXXXXXXX
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: ON
Effects plugins NOT ACTIVE
UPSAMPLING:
SoX not in use
SoX filter parameters
Bandwidth at 0dB = 99.5%
Filter max length = 30000
Anti-aliasing = 100
Phase = 66%
AUDIO VOLUME:
Max allowed volume: 100
Replay Gain: None
SW volume control: OFF
LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Volumes/Public/Shared Music
iTunes/Music library synchronization: not synchronized
Library database path: /Users/macmini/Library/Application Support/Audirvana/AudirvanaDatabase.sqlite
Local audio files fingerprinting
Tracks with no MBID: 442
Remote Control server:
Listening on 127.0.0.1 on port 60642
ACTIVE STREAMING SERVICES
TIDAL: Connected as HIFI
=================== AUDIO DEVICE ========================
Active method: Local
Max. memory for audio buffers: 15360MB
Local Audio Engine: CoreAudio
Exclusive access: ON
Integer mode: ON
Use max I/O buffer size: ON
Actual I/O buffer frame size: 512
Preferred device:
SMSL SMSL USB AUDIO
Model UID:SMSL USB AUDIO:152A:85DD
UID:AppleUSBAudioEngine:SMSL:SMSL USB AUDIO:14200000:1
Currently playing in Integer Mode:
Device: 2ch Non-mixable linear PCM Interleaved 32bits little endian Signed Integer, 8 bytes per frame 44.1kHz
Active Sample Rate: 44.1kHz
Hog Mode is on
Bridge settings:
Sample rate limitation: none
Sample rate switching latency: none
Limit bitdepth to 24bit: ON
Mute during sample rate change: ON
Selected device:SMSL USB AUDIO
Manufacturer: SMSL
Model name: SMSL USB AUDIO
Model UID: SMSL USB AUDIO:152A:85DD
UID: AppleUSBAudioEngine:SMSL:SMSL USB AUDIO:14200000:1
USB Vendor ID: 0x152a
USB Product ID: 0x85dd
ID 0x4c
10 available sample rates up to 768000Hz
44100
48000
88200
96000
176400
192000
352800
384000
705600
768000
Audio buffer frame size : 14 to 4096 frames
Current I/O buffer frame size : 512
Volume Control
Physical: Yes
Virtual: Yes
Max volume alert: Enabled
MQA capability
Auto-detect MQA devices: Yes
MQA Decoder device
DSD capability: Unhandled
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 0x4d 2 channels starting at 1
30 virtual formats:
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 768kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Float 705.6kHz
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 768kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 705.6kHz
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 768kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 705.6kHz
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
40 physical formats
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 768kHz
2 ch Mixable linear PCM Interleaved 32 little endian Signed Integer 705.6kHz
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 768kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 705.6kHz
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 768kHz
2 ch Non-mixable linear PCM Interleaved 32 little endian Signed Integer 705.6kHz
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 768kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer aligned low in 32bit 705.6kHz
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 : 5
Device #0: ID 0x45 Sortie intégrée
Manufacturer: Apple Inc.
Model UID: AppleHDA:88
UID: AppleHDAEngineOutput:1B,0,1,2:0
Model name: Apple Inc. Sortie intégrée
Device #1: ID 0x51 HDMI
Manufacturer: Apple Inc.
Model UID: AppleHDA:88
UID: AppleHDAEngineOutputDP:1B,3,1,2:0:{D94D-4803-01010101}
Model name: Apple Inc. HDMI
Device #2: ID 0x4c SMSL USB AUDIO
Manufacturer: SMSL
Model UID: SMSL USB AUDIO:152A:85DD
UID: AppleUSBAudioEngine:SMSL:SMSL USB AUDIO:14200000:1
USB Vendor ID: 0x152a
USB Product ID: 0x85dd
Model name: SMSL USB AUDIO
Device #3: ID 0x2c MMAudio Device
Manufacturer: MMAudio Device contributors
Model UID: MMAudioDeviceModelUID
UID: MMAudioDevice
Model name: MMAudio Device contributors MMAudio Device
Device #4: ID 0x31 MMAudio Device (UI Sounds)
Manufacturer: MMAudio Device contributors
Model UID: MMAudioDeviceModelUID_UISounds
UID: MMAudioDevice_UISounds
Model name: MMAudio Device contributors MMAudio Device (UI Sounds)
UPnP
UPnP devices found : 0
Chromecast
Chromecast devices found : 0
This is a known bug with MQA. Unless the manufacturer takes special steps to disable it (very few go to the effort and expense), once MQA processing is on, it stays on for the following files that are not MQA.
1 Like
Now i’ve found how to remove MQA badge on Audirvana when not playing MQA file.
I went to the MQA Setup and disabled automatic detection of the DAC and selected “MQA Decoder” in the list.
That’s all until this bug will be solved if so.
Regards,
Malik
3 Likes
It is doubtful the bug, which has persisted for years, will ever be resolved by MQA, which went bankrupt and has been purchased by another company. But at least Audirvana offers a workaround.
1 Like
@Jud
Indeed.
But the only thing that bothers me a little is that in Audirvana, the songs in 16/44khz come out to the DAC in 32/44khz format. Is this normal?
Regards,
Malik
P.S. see it in the screenshot joined:
You needn’t be concerned. This is called “zero padding,” where the DAC has 32 bits of processing space and the 16 missing bits are filled with zeroes.
It doesn’t change anything, any more than writing 1 as 1.00000000 changes the quantity. 
2 Likes
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