Hansong Stereo Hub USB and UPnP issues

Connection with external Audio Devices USB DAC
1

I have the Hansong Stereo Hub provided by Buchardt Audio with their A500 and A700 speakers. I have trouble controlling the device with USB or UPnP. For example when connected via USB and having the Software volume control turned on the volume drops to zero. There are other issues but I want to start with this one. I do have a good support contact at Hansong and at Buchardt.

UPnP does not seem to be a highly valued tool for Buchardt. Anyway I am looking for ideas.

Here is the data log from my Mac mini:

Audirvana Mac Version 3.5.42 (3572)
macOS 10.15.7 with 16384MB RAM

Registered to Robert Fairbairn

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: 82.2917
Replay Gain: by album
SW volume control: ON

LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Volumes/FairMusic/
iTunes/Music library synchronization: not synchronized
Library database path: /Users/bobfa/Library/Application Support/Audirvana/AudirvanaPlusDatabaseV2.sqlite

ACTIVE STREAMING SERVICES
Qobuz: Connected as Qobuz Studio
TIDAL: Connected as HIFI

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

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

Max. memory for audio buffers: 13312MB

Local Audio Engine:
Exclusive access: Enabled
Integer mode: Enabled

Preferred device:
Stereo Hub
Model UID:Stereo Hub:262A:1828
UID:AppleUSBAudioEngine:Hansong (Nanjing):Stereo Hub:14100000:2

Currently playing in Integer Mode:
Device: 2ch Non-mixable linear PCM Interleaved 24bits little endian Signed Integer, 6 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: OFF
Mute during sample rate change: OFF

Selected device:
Local audio device
ID 0x29 Stereo Hub Manufacturer:Hansong (Nanjing)
Model UID:Stereo Hub:262A:1828 UID:AppleUSBAudioEngine:Hansong (Nanjing):Stereo Hub:14100000:2

6 available sample rates up to 192000Hz
44100
48000
88200
96000
176400
192000
Audio buffer frame size : 15 to 4096 frames
Current I/O buffer frame size : 512
Volume Control
Physical: No
Virtual: Yes
MQA capability
Auto-detect MQA devices: No
Not a MQA device, user set to not MQA
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 0x2a 2 channels starting at 1
18 virtual formats:
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 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 176.4kHz
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
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

24 physical formats
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 192kHz
2 ch Mixable linear PCM Interleaved 24 little endian Signed Integer 176.4kHz
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 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 192kHz
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 176.4kHz
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
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 : 3
Device #0: ID 0x2e Built-in Output Manufacturer: Apple Inc. Model UID: AppleHDA:108 UID: AppleHDAEngineOutput:1B,0,1,2:0
Device #1: ID 0x35 HDMI Manufacturer: Apple Inc. Model UID: AppleHDA:108 UID: AppleHDAEngineOutputDP:3,0,1,1:0:{AC10-40BF-3538344C}
Device #2: ID 0x29 Stereo Hub Manufacturer: Hansong (Nanjing) Model UID: Stereo Hub:262A:1828 UID: AppleUSBAudioEngine:Hansong (Nanjing):Stereo Hub:14100000:2

UPnP devices found : 3
Device #0: ID 0x0 A500 UID: uuid:8a631856-0d04-11eb-ad7b-7f9200f59f04 Location: http://192.168.1.178:38400/description.xml
Device #1: ID 0x0 Humax RVU Client MediaRenderer UID: uuid:MediaRenderer-6C_B5_6B_44_6A_D0 Location: http://169.254.9.16:63445/upnp/xml/devices/MediaRenderer1.xml
Device #2: ID 0x0 Humax RVU Client MediaRenderer UID: uuid:MediaRenderer-08_EB_74_C8_26_AE Location: http://169.254.9.42:63445/upnp/xml/devices/MediaRenderer1.xml

2

Do you mean when you set the volume in Audirvana, it just don’t stay at the volume you set and reset to zero?

3

IT jumps all over the place. Their UPNP software seems to be weirdly broken with other software too. I have to figure out how to get Mads Buchardt to listen work through this.

4

Since it’s an active speaker, you should consider playing without the software volume control and control the volume on the speakers.