Playback hiccups AS

After a few months without a system I’ve updated my Mac Mini to OS 15.0.1 and am using UPNP to a (temporary) TEAC AI-301DA/Melco N1. This was working two months ago before Sequoia. Now every track hiccups as the preloading starts behind replay. You can see the grey bar pause 2 or three times as the beginning on any track and the sound hiccups. I’ve tried exaggerated settings for pre-load but it makes no difference? Any suggestions (other than to wait for Mac OS 15.1?). I was using the TEAC ASIO driver 1.0.6 but had updated to 1.0.7 - going back to the older version makes no difference.
Any suggestions?

Back to Sonoma?

More information is needed… Please paste your debug information here so folks can help the best possible… It is found here:
Settings–> My Account–> Help–> Debug info

:notes: :eye: :headphones: :eye: :notes:

The DAC is connected to the N1… it is unclear as to why you are using the TEAC ASIO driver at all… macOS does not require a driver for UPnP…

:notes: :eye: :headphones: :eye: :notes:

Sorry to mislead - the MacMini is more commonly connected directly USB to the DAC - with system rearrangements this is physically not possible - hence UPnP. I included this information merely to say the driver was loaded as a system extension.

As it’s late here I’ll run a debug tomorrow…

There is no USB driver needed for any DAC connected to a macOS platform via USB.

:notes: :eye: :headphones: :eye: :notes:

Funny that TEAC go to the trouble to write and supply them!

The driver is to enable the transmission mode to be changed from isochronous to one of four Bulk Pet modes. Transmission mode can be set to Isochronous or Bulk Pet for UD-701N, VRDS-701, UD-507, UD-505, UD-505-X, NT-505, NT-505-X, AI-303 and AI-301DA-Z models. Supported Mac OS is from macOS High Sierra (10.13) through macOS Sonoma (14). This seems only of relevance to user of TEAC’s own HR Audio player.

First thing to note is that AS Debug information shows the following:

NETWORK
Status: available
Local network access: forbidden

Yet System Settings > Privacy & Security shows:

I’ll try playing something and do a debug session later…

Debug info (Session Log follows as separate entry)
Audirvana Studio 2.9.2 (20902)

macOS 15.0.1 with 8GB physical RAM

Connected account of : anon

NETWORK
Status: available
Local network access: allowed

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: 21 folders
AUTO: /Volumes/share/music/BAROQUE
AUTO: /Volumes/share/music/BAROQUE COMPILATIONS
AUTO: /Volumes/share/music/BROADCASTS
AUTO: /Volumes/share/music/CLASSICAL - 20th Century
AUTO: /Volumes/share/music/CLASSICAL - Classical Era
AUTO: /Volumes/share/music/CLASSICAL - Post-Romantic
AUTO: /Volumes/share/music/CLASSICAL - Romantic
AUTO: /Volumes/share/music/CLASSICAL - Second Viennese School
AUTO: /Volumes/share/music/CLASSICAL ARTISTS
AUTO: /Volumes/share/music/CLASSICAL COMPILATIONS
AUTO: /Volumes/share/music/CONTEMPORARY
AUTO: /Volumes/share/music/EARLY MUSIC
AUTO: /Volumes/share/music/FILM MUSIC
AUTO: /Volumes/share/music/FOLK
Manual: /Volumes/share/music/INTERNET RADIO
AUTO: /Volumes/share/music/JAZZ & WORLD
AUTO: /Volumes/share/music/LIGHT CLASSICS
AUTO: /Volumes/share/music/MISC
AUTO: /Volumes/share/music/MUSICALS
AUTO: /Volumes/share/music/ROCK & POP
AUTO: /Volumes/share/music/SOUL, R&B
iTunes/Music library synchronization: not synchronized
Library database path: /Users/anon/Library/Application Support/Audirvana/AudirvanaDatabase.sqlite

Local audio files fingerprinting
Tracks with no MBID: 40286

Remote Control server:
Listening on on port 49182

ACTIVE STREAMING SERVICES

APPEARANCE SETTINGS:
UI theme: dark
Font size: regular
Language: System language
Show album covers in tracks list: yes
Source list sorted:
Local
My Music
Radios
Podcasts
Streaming
Startup view: Local Library: Albums
Show local extended in source list: yes
Use media keys: yes
Use media keys for volume control: yes
Use Apple Remote: yes
Number of paired remotes: 5
Remote pairing code required: yes
Screen saver disabled: yes

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

Active method: UPnP

Preferred device: [UPnP] N1-210C TEAC AI-301DA:MediaRenderer Model UID:MELCO Syncrets Inc. MELCO Music Player UID:uuid:d19099f607425917ccbf854e6ff65da5

Currently playing to UPnP device at 24 bits 44.1kHz
Selected device:N1-210C TEAC AI-301DA:MediaRenderer
Manufacturer: MELCO Syncrets Inc.
Model name: MELCO Music Player
Model UID: MELCO Syncrets Inc. MELCO Music Player
UID: uuid:d19099f607425917ccbf854e6ff65da5
UPnP device at http://192.168.1.72:49494/d19099f607425917ccbf854e6ff65da5.xml
ID 0x0

9 available sample rates up to 11289600Hz
44100
48000
88200
96000
176400
192000
2822400
5644800
11289600

Volume control: Yes
Max volume alert: Disabled

MQA capability
Auto-detect MQA devices: Yes
Not automatically detected, 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

UPnP set capabilities
Maximum PCM frequency set: 192000Hz
Maximum PCM bitdepth set: 24
Maximum DSD rate set: DSD256
Avoid RAW PCM streams: No
Unwanted playback stop workaround: Yes

UPnP / DLNA supported protocols :
http-get::::::
http-get::http-get::::*
http-get::audio/x-aac:
http-get::audio/aac:
http-get::audio/ogg:
http-get::audio/L16;rate=44100;channels=2:
http-get::audio/x-scpls:
http-get::audio/mpeg:
http-get::audio/x-mpeg:
http-get::audio/wav:
http-get::audio/x-wav:
http-get::audio/flac:
http-get::audio/x-flac:
http-get::audio/x-dff:
http-get::audio/x-dsf:
http-get::audio/dsd:
http-get::audio/x-dsd:
http-get::audio/aiff:
http-get::audio/x-aiff:
http-get::audio/alac:
http-get::audio/x-alac:
http-get::audio/mp4:
http-get::audio/m4a:
http-get::audio/x-m4a:
DLNA 1.5: No
Native Gapless playback: Yes
Universal Gapless playback active: No
Missing events workaround: No
Can play native DSD: Yes
Volume Control: dB (-60dB to 0dB)
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
16 virtual formats:
2 ch Non-mixable linear PCM Interleaved 16 big endian Signed Integer 44.1kHz
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 44.1kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 44.1kHz finite length
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 88.2kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 88.2kHz finite length
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 176.4kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 176.4kHz finite length
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 48kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 48kHz finite length
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 96kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 96kHz finite length
2 ch Non-mixable linear PCM Interleaved 16 little endian Signed Integer 192kHz finite length
2 ch Non-mixable linear PCM Interleaved 24 little endian Signed Integer 192kHz finite length
2 ch Non-mixable linear PCM Interleaved 8 little endian Signed Integer 2822.4kHz finite length
2 ch Non-mixable linear PCM Interleaved 8 little endian Signed Integer 5644.8kHz finite length
2 ch Non-mixable linear PCM Interleaved 8 little endian Signed Integer 11289.6kHz finite length

0 physical formats

Current device transportInfo:

Current device MediaInfo:

Current transport actions:

Current device AVT service description:

Current device RootDevice description:

<?xml version="1.0"?> 1 0 urn:schemas-upnp-org:device:MediaRenderer:1 N1-210C TEAC AI-301DA:MediaRenderer MELCO Syncrets Inc. http://www.melco-audio.com/ MELCO Music Player 2.0.0 MELCO Music Player 2021-06-16_a3262717d http://www.melco-audio.com/ uuid:d19099f607425917ccbf854e6ff65da5 image/png 48 48 24 /upnp/grender-48x48.png image/png 120 120 24 /upnp/grender-120x120.png urn:schemas-upnp-org:service:AVTransport:1 urn:upnp-org:serviceId:AVTransport /upnp/rendertransportSCPD.xml /upnp/control/rendertransport1 /upnp/event/rendertransport1 urn:schemas-upnp-org:service:ConnectionManager:1 urn:upnp-org:serviceId:ConnectionManager /upnp/renderconnmgrSCPD.xml /upnp/control/renderconnmgr1 /upnp/event/renderconnmgr1 urn:schemas-upnp-org:service:RenderingControl:1 urn:upnp-org:serviceId:RenderingControl /upnp/rendercontrolSCPD.xml /upnp/control/rendercontrol1 /upnp/event/rendercontrol1 http://192.168.1.72:49494/

UPnP devices found : 3
Device #0: ID 0x0 : 50EX750_Series
UID: uuid:4D454930-0100-1000-8001-D8AFF1AEC5AD
Location: http://192.168.1.86:55000/dmr/ddd.xml
Manufacturer: Panasonic
Model name: Panasonic VIErA
Device #1: ID 0x0 : Roberts Stream 93i 0022612536f8
UID: uuid:3DCC7100-F76C-11DD-87AF-0022612536F8
Location: http://192.168.1.126:8080/dd.xml
Manufacturer: Roberts Radio Limited
Model name: Roberts Stream 93i
Device #2: ID 0x0 : N1-210C TEAC AI-301DA:MediaRenderer
UID: uuid:d19099f607425917ccbf854e6ff65da5
Location: http://192.168.1.72:49494/d19099f607425917ccbf854e6ff65da5.xml
Manufacturer: MELCO Syncrets Inc.
Model name: MELCO Music Player

Local

Max. memory for audio buffers: 3294MB

Local Audio Engine: CoreAudio
Actual I/O buffer frame size: 0

Local devices found : 2
Device #0: ID 0x62 Panasonic-TV
Manufacturer: Apple Inc.
Model UID: AppleGFXHDA:0
UID: AppleGFXHDAEngineOutputDP:f803:0:{A934-A296-01010101}
Model name: Apple Inc. Panasonic-TV
Device #1: ID 0x6a Mac mini Speakers
Manufacturer: Apple Inc.
Model UID: Speaker
UID: BuiltInSpeakerDevice
Model name: Apple Inc. Mac mini Speakers

Chromecast

Chromecast devices found : 0

There were at least three loading hiccups during the start of this track

Big snip

2024-10-16 13:51:33.897 [debug]: UPnP send setNextAVTransportURI for track Schobert: Concerto No.3 in G major - I. Allegro ma non tanto
2024-10-16 13:51:33.903 [debug]: UPnP seeking to other buffer
2024-10-16 13:51:33.979 [debug]: UPnP Received updated transport actions:PLAY,SEEK
2024-10-16 13:51:33.979 [debug]: UPnP Set next Chunk setPlayingBuffer 12 for buffer 0 starting at 0
2024-10-16 13:51:34.022 [debug]: UPnP Success setting AVTransportURI to http://192.168.1.102:49152/audirvana/audio_f_12.wav
2024-10-16 13:51:34.037 [debug]: UPnP Received AVTransportURI change to http://192.168.1.102:49152/audirvana/audio_f_12.wav
2024-10-16 13:51:34.050 [debug]: UPnP Received updated transport actions:PAUSE,STOP,SEEK
2024-10-16 13:51:34.052 [debug]: UPnP Send info for file audio_f_12.wav from buffer 0 trackId 12 title: Schobert: Concerto No.3 in G major - I. Allegro ma non tanto
2024-10-16 13:51:34.052 [debug]: UPnP open file /audirvana/audio_f_12.wav
2024-10-16 13:51:34.052 [debug]: UPnP sent WAVE header with fileLength 65797244 audio data 65797200 from buffer 0 trackId 12
2024-10-16 13:51:34.052 [debug]: UPnP received audio data request from 0 for 1048532 loaded 0 from buffer 0 trackId 12
2024-10-16 13:51:34.086 [debug]: UPnP Success sending Play (unpause) request
2024-10-16 13:51:34.089 [debug]: UPnP Received new transport state PLAYING
2024-10-16 13:51:34.159 [debug]: UPnP send setNextAVTransportURI for track Schobert: Concerto No.3 in G major - II. Andante
2024-10-16 13:51:34.243 [debug]: UPnP Exiting playing start polling loop with 49 attempts remaining
2024-10-16 13:51:34.291 [debug]: UPnP Exiting playing start polling loop with 49 attempts remaining
2024-10-16 13:51:34.438 [debug]: UPnP Success setting NextAVTransportURI to http://192.168.1.102:49152/audirvana/audio_f_12.wav
2024-10-16 13:51:34.553 [debug]: UPnP sending audio from 0:0 playing 0:0 loaded to 0:10 from 0 for 1048532 requested 1048532 loaded 1764000 from buffer 0 trackId 12
2024-10-16 13:51:34.658 [debug]: UPnP received audio data request from 1048532 for 1048576 loaded 1764000 from buffer 0 trackId 12
2024-10-16 13:51:34.701 [debug]: UPnP Success setting NextAVTransportURI to http://192.168.1.102:49152/audirvana/audio_f_13.wav
2024-10-16 13:51:35.158 [debug]: UPnP sending audio from 0:5 playing 0:0 loaded to 0:20 from 1048532 for 1048576 requested 1048576 loaded 3528000 from buffer 0 trackId 12
2024-10-16 13:51:35.191 [debug]: UPnP received audio data request from 2097108 for 1048576 loaded 3528000 from buffer 0 trackId 12
2024-10-16 13:51:35.191 [debug]: UPnP sending audio from 0:11 playing 0:0 loaded to 0:20 from 2097108 for 1048576 requested 1048576 loaded 3528000 from buffer 0 trackId 12
2024-10-16 13:51:35.231 [debug]: UPnP received audio data request from 3145684 for 1048576 loaded 3528000 from buffer 0 trackId 12
2024-10-16 13:51:35.732 [debug]: UPnP sending audio from 0:17 playing 0:0 loaded to 0:30 from 3145684 for 1048576 requested 1048576 loaded 5292000 from buffer 0 trackId 12
2024-10-16 13:51:35.733 [debug]: UPnP received audio data request from 4194260 for 1048576 loaded 5292000 from buffer 0 trackId 12
2024-10-16 13:51:35.733 [debug]: UPnP sending audio from 0:23 playing 0:0 loaded to 0:30 from 4194260 for 1048576 requested 1048576 loaded 5292000 from buffer 0 trackId 12
2024-10-16 13:51:35.748 [debug]: UPnP received audio data request from 5242836 for 1048576 loaded 5292000 from buffer 0 trackId 12
2024-10-16 13:51:36.749 [debug]: UPnP sending audio from 0:29 playing 0:1 loaded to 0:50 from 5242836 for 1048576 requested 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:36.751 [debug]: UPnP received audio data request from 6291412 for 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:36.751 [debug]: UPnP sending audio from 0:35 playing 0:1 loaded to 0:50 from 6291412 for 1048576 requested 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:36.752 [debug]: UPnP received audio data request from 7339988 for 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:36.752 [debug]: UPnP sending audio from 0:41 playing 0:1 loaded to 0:50 from 7339988 for 1048576 requested 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:36.771 [debug]: UPnP received audio data request from 8388564 for 1048576 loaded 8820000 from buffer 0 trackId 12
2024-10-16 13:51:37.272 [debug]: UPnP sending audio from 0:47 playing 0:2 loaded to 0:55 from 8388564 for 1048576 requested 1048576 loaded 9702000 from buffer 0 trackId 12
2024-10-16 13:51:37.273 [debug]: UPnP received audio data request from 9437140 for 1048576 loaded 9702000 from buffer 0 trackId 12
2024-10-16 13:51:37.774 [debug]: UPnP sending audio from 0:53 playing 0:2 loaded to 1:10 from 9437140 for 1048576 requested 1048576 loaded 12348000 from buffer 0 trackId 12
2024-10-16 13:51:37.775 [debug]: UPnP received audio data request from 10485716 for 1048576 loaded 12348000 from buffer 0 trackId 12
2024-10-16 13:51:37.775 [debug]: UPnP sending audio from 0:59 playing 0:2 loaded to 1:10 from 10485716 for 1048576 requested 1048576 loaded 12348000 from buffer 0 trackId 12
2024-10-16 13:51:37.776 [debug]: UPnP received audio data request from 11534292 for 1048576 loaded 12348000 from buffer 0 trackId 12
2024-10-16 13:51:38.276 [debug]: UPnP sending audio from 1:5 playing 0:3 loaded to 1:20 from 11534292 for 1048576 requested 1048576 loaded 14112000 from buffer 0 trackId 12
2024-10-16 13:51:38.277 [debug]: UPnP received audio data request from 12582868 for 1048576 loaded 14112000 from buffer 0 trackId 12
2024-10-16 13:51:38.277 [debug]: UPnP sending audio from 1:11 playing 0:3 loaded to 1:20 from 12582868 for 1048576 requested 1048576 loaded 14112000 from buffer 0 trackId 12
2024-10-16 13:51:38.277 [debug]: UPnP received audio data request from 13631444 for 1048576 loaded 14112000 from buffer 0 trackId 12
2024-10-16 13:51:38.778 [debug]: UPnP sending audio from 1:17 playing 0:3 loaded to 1:35 from 13631444 for 1048576 requested 1048576 loaded 16758000 from buffer 0 trackId 12
2024-10-16 13:51:38.779 [debug]: UPnP received audio data request from 14680020 for 1048576 loaded 16758000 from buffer 0 trackId 12
2024-10-16 13:51:38.779 [debug]: UPnP sending audio from 1:23 playing 0:3 loaded to 1:35 from 14680020 for 1048576 requested 1048576 loaded 16758000 from buffer 0 trackId 12
2024-10-16 13:51:38.780 [debug]: UPnP received audio data request from 15728596 for 1048576 loaded 16758000 from buffer 0 trackId 12
2024-10-16 13:51:39.281 [debug]: UPnP sending audio from 1:29 playing 0:4 loaded to 1:50 from 15728596 for 1048576 requested 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.282 [debug]: UPnP received audio data request from 16777172 for 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.282 [debug]: UPnP sending audio from 1:35 playing 0:4 loaded to 1:50 from 16777172 for 1048576 requested 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.282 [debug]: UPnP received audio data request from 17825748 for 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.282 [debug]: UPnP sending audio from 1:41 playing 0:4 loaded to 1:50 from 17825748 for 1048576 requested 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.330 [debug]: UPnP received audio data request from 18874324 for 1048576 loaded 19404000 from buffer 0 trackId 12
2024-10-16 13:51:39.831 [debug]: UPnP sending audio from 1:46 playing 0:4 loaded to 2:15 from 18874324 for 1048576 requested 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.832 [debug]: UPnP received audio data request from 19922900 for 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.832 [debug]: UPnP sending audio from 1:52 playing 0:4 loaded to 2:15 from 19922900 for 1048576 requested 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.832 [debug]: UPnP received audio data request from 20971476 for 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.832 [debug]: UPnP sending audio from 1:58 playing 0:4 loaded to 2:15 from 20971476 for 1048576 requested 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.863 [debug]: UPnP received audio data request from 22020052 for 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.863 [debug]: UPnP sending audio from 2:4 playing 0:4 loaded to 2:15 from 22020052 for 1048576 requested 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:39.946 [debug]: UPnP received audio data request from 23068628 for 1048576 loaded 23814000 from buffer 0 trackId 12
2024-10-16 13:51:40.447 [debug]: UPnP sending audio from 2:10 playing 0:4 loaded to 3:10 from 23068628 for 1048576 requested 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.485 [debug]: UPnP received audio data request from 24117204 for 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.485 [debug]: UPnP sending audio from 2:16 playing 0:4 loaded to 3:10 from 24117204 for 1048576 requested 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.572 [debug]: UPnP received audio data request from 25165780 for 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.572 [debug]: UPnP sending audio from 2:22 playing 0:4 loaded to 3:10 from 25165780 for 1048576 requested 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.663 [debug]: UPnP received audio data request from 26214356 for 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.663 [debug]: UPnP sending audio from 2:28 playing 0:4 loaded to 3:10 from 26214356 for 1048576 requested 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.776 [debug]: UPnP received audio data request from 27262932 for 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:40.776 [debug]: UPnP sending audio from 2:34 playing 0:4 loaded to 3:10 from 27262932 for 1048576 requested 1048576 loaded 33516000 from buffer 0 trackId 12
2024-10-16 13:51:42.493 [debug]: UPnP Success sending Pause request
2024-10-16 13:51:42.498 [debug]: UPnP Received updated transport actions:PLAY,STOP,SEEK
2024-10-16 13:51:42.498 [debug]: UPnP Received new transport state PAUSED_PLAYBACK
2024-10-16 13:51:42.697 [debug]: UPnP Exiting playing start polling loop with 49 attempts remaining

Yes… I know Bulk PET protocol requires a proprietary USB driver… Thanks for clearing up your statement… As far as I know personally, at this point it is only relevant to TEAC device owners. It is quite an an advancement for the transmission of digital-audio signals via USB.

It is fast becoming evident that macOS 15.0.1 is presenting problems for users transmitting digital-audio signals via UPnP…
This forum thread my be relevant:

Also, my personal feeling is that macOS Sequoia requires more System RAM than previous versions and will present operational anomalies in systems with 8GB of RAM that are allocating playback pre-load memory nearing 50% of the available System RAM.

:notes: :eye: :headphones: :eye: :notes:

Note the Bold text in the above debug information…
Are you trying to play some file sample-rates above the UPnP PCM 192kHz maximum setting configuration?

:notes: :eye: :headphones: :eye: :notes:

I tend to agree with you about Sequoia’s overheads - I have tried a wide range of pre-load settings with no effect whatsoever on the hiccuping at the start of every selected track. Also tried ‘Missing events workaround’ both on and off to no effect.

Not guilty - the errors occur with RedBook CD rips at 16/44.1 as well as with 24/96 and 24/192 downloads - I only have one DSD128 file which was not part of the experiment!

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