Can anyone help me restore my previous available sample rate : 192 on my Benchmark DAC2 HGC ?
All of a sudden the DAC will playback only in 96 kHz from 192 kHz material.
I’ve tried turning off the DAC, removed the power cable, restarted the Mac and can’t think of anything else at the moment, but no 192 kHz resolution ? The only thing that might have messed things up was me using the DAC for outgoing sound from Safari, when watching a movie the other night, something I rarely does. I’ve changed that off course, but I can’t get back to where I was before : 192 kHz resolution 
Hello @Lars_Hansen,
Can you send me a copy of the “Debug Info” while your Dac is selected? You can get it in Audirvana Settings>General>Debug Info
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
Hello Damien,
Here it is (replied to your e-mail first ):
Audirvana Mac Version 3.5.38 (3568)
macOS 10.11.6 with 16384MB RAM
Registered to Lars Hansen
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: OFF
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: 3 folders
AUTO: /Volumes/Data/Musik/iTunes Max/iTunes 1/iTunes Media/Music
AUTO: /Users/larshansen/Music/Audio Tracks
AUTO: /Users/larshansen/Music/iTunes/iTunes Media/Music
iTunes/Music library synchronization: not synchronized
Library database path: /Users/larshansen/Library/Application Support/Audirvana/AudirvanaPlusDatabaseV2.sqlite
ACTIVE STREAMING SERVICES
Qobuz: Connected as Qobuz Studio
=================== AUDIO DEVICE ========================
Direct Mode audio path, buffer I/O frame size: 512
Max. memory for audio buffers: 12032MB
Local Audio Engine:
Exclusive access: Enabled
Integer mode: Enabled
Preferred device:
Benchmark DAC2 USB 1.0 Audio Out
Model UID:Benchmark DAC2 USB Audio 1.0:1781:0E4E
UID:AppleUSBAudioEngine:Benchmark DAC2 :Benchmark DAC2 USB Audio 1_0:0000:1
Currently playing in Integer Mode:
Device: 2ch Non-mixable linear PCM Interleaved 24bits little endian Signed Integer, 6 bytes per frame 96kHz
Active Sample Rate: 96kHz
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 0x26 Benchmark DAC2 USB 1.0 Audio Out Manufacturer:Benchmark DAC2
Model UID:Benchmark DAC2 USB Audio 1.0:1781:0E4E UID:AppleUSBAudioEngine:Benchmark DAC2 :Benchmark DAC2 USB Audio 1_0:0000:1
4 available sample rates up to 96000Hz
44100
48000
88200
96000
Audio buffer frame size : 29 to 4096 frames
Current I/O buffer frame size : 512
Volume Control
Physical: Yes
Virtual: Yes
MQA capability
Auto-detect MQA devices: No
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 0x27 2 channels starting at 1
8 virtual formats:
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 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 44.1kHz
8 physical formats
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 96kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 88.2kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 48kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 44.1kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 96kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 88.2kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 48kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 44.1kHz
Local devices found : 3
Device #0: ID 0x33 Built-in Output Manufacturer: Apple Inc. Model UID: AppleHDA:108 UID: AppleHDAEngineOutput:1B,0,1,2:0
Device #1: ID 0x3a HDMI Manufacturer: Apple Inc. Model UID: AppleHDA:108 UID: AppleHDAEngineOutputDP:3,0,1,1:0:{0C41-0000-01010101}
Device #2: ID 0x26 Benchmark DAC2 USB 1.0 Audio Out Manufacturer: Benchmark DAC2 Model UID: Benchmark DAC2 USB Audio 1.0:1781:0E4E UID: AppleUSBAudioEngine:Benchmark DAC2 :Benchmark DAC2 USB Audio 1_0:0000:1
UPnP devices found : 0
Check the USB class mode. Switch to USB class 2 (profile 2) for sampling rates above 96KHz.
Thanks, bitracer - that did it.
Had forgotten all about USB class setting on the DAC. Must have done it once back in 2014 when I purchased the DAC.
Now I’ll remember 