Dear all,
I notice that Audirvana 3.5 (Audirvana Mac Version 3.5.34 (3564) macOS 10.15.4 with 8192MB RAM, core i7 5650U 2.2GHz) uses sometimes a complete core (up to 98%) to play music and sometimes almost nothing (down to 1.5%) of CPU. Did you notice something similar. The problem is that the high CPU usage makes the ventilator very noisy.
Thank you for your answer,
Best regards.
Do you use Upsampling ?
Hello @BikingDutchMan,
Can you send a copy of the “Debug Info”? You can get it in Audirvana Settings>General>Debug Info
Note: By clicking on the Debug Info Audirvana button automatically copies all its content, all you have to do is paste it in response to this message
Yes factor 2 and my DAC is limited to 24/96.
Yes of course, please find it enclosed:
Audirvana Mac Version 3.5.34 (3564)
macOS 10.15.4 with 8192MB RAM
Registered to **********
SIGNAL PROCESSING:
Polarity Inversion:
Globally: OFF
Per track: ON
Effects plugins NOT ACTIVE
UPSAMPLING:
SoX with Power Of Two upsampling
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: ON
LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Volumes/Audio/Linear
iTunes/Music library synchronization: not synchronized
Library database path: /Users/********/Library/Application Support/Audirvana/AudirvanaPlusDatabaseV2.sqlite
ACTIVE STREAMING SERVICES
=================== AUDIO DEVICE ========================
CoreAudio audio path, buffer I/O frame size: 512
Max. memory for audio buffers: 1008MB
Local Audio Engine:
Exclusive access: Enabled
Integer mode: Enabled
Preferred device:
OWC Thunderbolt 3 Audio Device
Model UID:OWC Thunderbolt 3 Audio Device:1E91:4001
UID:AppleUSBAudioEngine:Other World Computing:OWC Thunderbolt 3 Audio Device:1400000:1
Active Sample Rate: 48kHz
Hog Mode is off
Bridge settings:
Sample rate limitation: 96kHz
Sample rate switching latency: none
Limit bitdepth to 24bit: ON
Mute during sample rate change: OFF
Selected device:
Local audio device
ID 0x32 Built-in Output Manufacturer:Apple Inc.
Model UID:AppleHDA:125 UID:AppleHDAEngineOutput:1B,0,1,1:0
4 available sample rates up to 96000Hz
44100
48000
88200
96000
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 0x33 2 channels starting at 1
4 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
4 physical formats
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
Local devices found : 1
Device #0: ID 0x32 Built-in Output Manufacturer: Apple Inc. Model UID: AppleHDA:125 UID: AppleHDAEngineOutput:1B,0,1,1:0
UPnP devices found : 0
Stop upsampling it will be at mostly zero always 
Thank you I will try to do it when I run Audirvana in this settings. Best regards,