When using upsampling - why the volume jump up when the song in it's silent part

When I turn on the Audirvana upsampling function, the volume during playback the song will goes up when silent intro or vocal solo, or music fade out at the end. It sound like those Gate Compressor, it gain many dB when during the silent low noise part of the song. But when I turn off the upsampling, it dont have that issue.

*** But when I not play through the IFI Zen Streamer (only use Macbook headphone output) the problem disappear.

Can anyone tell me what setting I do wrong? Anyone has the same experience?

I don’t really expect this to happen in Audirvana, rather it’s a result of the upsampling. But I don’t quite get it.

Do you have a way to reduce a 4dB of gain? I use PurestGain | Airwindows for testing.

Which DAC do you use with the streamer? What happens if you skip the streamer and connect the DAC via USB?

Can you share Audirvana’s Debug info here. Don’t forget to remove your personal information before posting.

I am using Topping D50s DAC connect to IFI Stream. Between macbook to streamer connect by LAN line I believe.

Audirvana Studio 1.7.1 (10701)

macOS 10.13 with 16GB physical RAM

SIGNAL PROCESSING:

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

UPSAMPLING:
SoX with Power Of Two upsampling
SoX filter parameters
Bandwidth at 0dB = 90.0109%
Filter max length = 30000
Anti-aliasing = 100
Phase = 100%

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

LIBRARY SETTINGS:
Sync list: 1 folders
AUTO: /Volumes/480GB MUSIC/HD Music Library
iTunes/Music library synchronization: last synchronized on Fri Oct 1 21:49:36 2021

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

Remote Control server:

ACTIVE STREAMING SERVICES
TIDAL: Connected as HIFI

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

Preferred device: IFI AUDIO IFI Model UID:iFi audio IFi

Selected device:
UPnP device at
ID 0x0 IFi
Manufacturer: iFi audio
Model Name:
Model UID: iFi audio IFi
UID:

8 available sample rates up to 384000Hz
44100
48000
88200
96000
176400
192000
352800
384000
Volume control: No
MQA capability
Auto-detect MQA devices: Yes
Not a MQA device, user set to not MQA
DSD capability: Raw DSD (MSB)
Device audio channels
Preferred stereo channels L:0 R:1
Channel bitmap: Ox3, layout:
Channel 0 mapped to 0
Channel 1 mapped to 1
Avoid RAW PCM streams: Yes
DLNA 1.5: No
Gapless playback: Yes
Missing events workaround: No
Can play native DSD: Yes
Volume Control: scalar
Number of channels: 2
Use as stereo device only: No

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 0x0 0 channels starting at 0

0 physical formats

Current device transportInfo:
CurrentTransportState: STOPPED
CurrentTransportStatus: OK
CurrentSpeed: 1
Current device MediaInfo:
NrTracks: 1
MediaDuration: 00:00:00
CurrentURI:
CurrentURIMetadata:
nextURI:
nextURIMetadata:
PlayMedium: NONE
RecordMedium: NOT_IMPLEMENTED
WriteStatus: NOT_IMPLEMENTED

Hello @cantonpro,

Are you aware you invert polarity globally? By default we set this up per track only. Can you put the global polarity inversion off?

I set as you suggested. Same issue,but If I connect macbook to Topping DAC, no problem at all. So I think is IFI Steam has some bug with Audirvana when upsampling. (There is a compressor inside the IFI stream which filter all upsampling signal input)

Can you ask iFi about it? They have Studio on their side since we gave them partners accounts. You can also add [email protected] in CC of your conversation with them.

Have you tried lowering the gain by 4 to 6dB? I’m curious if the effect will go away.

Just updated latest version of Audirvana and IFI streamer firmware both. The problem gone…

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