WiiM Pro Plus Firmware v4.8.732046 Update - Oct 10, 2025

Please review the WiiM Pro Plus update release notes below. If you encounter any issues, feel free to reach out to us. This firmware update is being rolled out in stages, with devices updating sequentially over the next few days.

4.8.732046 (In Progress)​

Release date:

10 / 10 / 2025

What's New:

1. TuneIn: Automatically selects the highest-quality stream.

Bug Fixes:

1. YouTube Music: Fixed playback noise and incorrect metadata.
2. TIDAL Connect: Corrected metadata display.
3. Qobuz Connect: Fixed the issue where gapless playback was not working.
4. Google Cast: Fixed occasional no-sound issues.
5. SoundTrack: Fixed missing audio during the first two seconds of announcements.
6. YouTube Music Group Playback: Fixed no-sound issue when switching to group playback.

 

[slartibartfast]

It is aac+96 24bit/48khz. It is superior. Also the broadcast radio annouces it as it superior quality stream in its page...yet tuneIn selects automatically the mp3 128kbps. TuniIn app also does the same by the way, so apparently the wiim firmware is just replicating what the TuneIn app does.

I know the 96kbps AAC+ stream is better than the 128kbps MP3 stream but why do you think the AAC+ stream is 24 bit?

 

[hipoagumol]

I know the 96kbps AAC+ stream is better than the 128kbps MP3 stream but why do you think the AAC+ stream is 24 bit?

Why not? 24b is becoming standard for high-res audio so the've chosen to sample their media using this bit depth. It is probably default of aac encoder. Radio Swiss Jazz aacPlus streams are all 24b/48khz and they offer in their page 32, 48 and 96 kbps, being the aac+96 clearlly advised as the best quality stream of all. Still tuneIn selects the mp3.

 

[slartibartfast]

Why not? 24b is becoming standard for high-res audio so the've chosen to sample their media using this bit depth. It is probably default of aac encoder. Radio Swiss Jazz aacPlus streams are all 24b/48khz and they offer in their page 32, 48 and 96 kbps, being the aac+96 clearlly advised as the best quality stream of all. Still tuneIn selects the mp3.

Do they say they are 24/48kHz? All the info on aac+ seems to say it doesn't really have a fixed bit depth. I don't even know how to tell. Most DACs only display sample rate.

 

[hipoagumol]

Do they say they are 24/48kHz? All the info on aac+ seems to say it doesn't really have a fixed bit depth. I don't even know how to tell. Most DACs only display sample rate.

24bits 48khz is the bit depth and rate at which the audio encoder (in this case aac+) samples the original uncompressed audio signal. Then it applies its compresion algorithms on top of this, and the out file in aac+ format has a variable bitrate, yes. 96kbps is the target average rate set when encoding, but each second of the track the bitrate may vary up or down depending on the conplexity of the song. Media players will normally display average bitrate of the track.

https://stream.srg-ssr.ch/srgssr/rsj/aac/96

 

[slartibartfast]

24bits 48khz is the bit depth and rate at which the audio encoder (in this case aac+) samples the original uncompressed audio signal. Then it applies its compresion algorithms on top of this, and the out file in aac+ format has a variable bitrate, yes. 96kbps is the target average rate set when encoding, but each second of the track the bitrate may vary up or down depending on the conplexity of the song. Media players will normally display average bitrate of the track.

https://stream.srg-ssr.ch/srgssr/rsj/aac/96
View attachment 28237

If I play the same stream from Lyrion to my WiiM Amp the WiiM Home app reports 16/48. How do we know which is correct?

 

[hipoagumol]

If I play the same stream from Lyrion to my WiiM Amp the WiiM Home app reports 16/48. How do we know which

I have used Wiim's Home App "Open Network Stream" to open de URL on my Pro Plus so it is Wiim Pro Plus directly connecting to then URL decompresing to PCM at the maximum bit depth wiim pro plus allows, 24bits, and finally DAC outputingitin my case to analog line out to my amp. Don't know what that Lyrion is but if it is some media server you've installed somewhere else it may be just decoding then signal and resampling it to 16bits as 24bit output may not be supported. Try Open Network Stream and let the decoding happen at your wiim amp. You'll surely see then the 24bits in wiim home app player.

 

[slartibartfast]

I have used Wiim's Home App "Open Network Stream" to open de URL on my Pro Plus so it is Wiim Pro Plus directly connecting to then URL decompresing to PCM at the maximum bit depth wiim pro plus allows, 24bits, and finally DAC outputingitin my case to analog line out to my amp. Don't know what that Lyrion is but if it is some media server you've installed somewhere else it may be just decoding then signal and resampling it to 16bits as 24bit output may not be supported. Try Open Network Stream and let the decoding happen at your wiim amp. You'll surely see then the 24bits in wiim home app player.

Lyrion formerly Logitech server is capable of 24 bit so it isn't that. Wasn't there some discussion a while back about the WiiM Home app displaying the wrong bit depth. Anyway whatever the bit depth is it sounds good.

 

[hipoagumol]

Lyrion formerly Logitech server is capable of 24 bit so it isn't that. Wasn't there some discussion a while back about the WiiM Home app displaying the wrong bit depth. Anyway whatever the bit depth is it sounds good.

Sure! But please give a try to open directly the URL from Open Network Stream option in wiim home app and tell us what you see.. this Lyrion is integrated through Squeezelite right, maybe that is the cause... or maybe it is as you said, a bug in wiim home app

 

[slartibartfast]

Sure! But please give a try to open directly the URL from Open Network Stream option in wiim home app and tell us what you see.. this Lyrion is integrated through Squeezelite right, maybe that is the cause... or maybe it is as you said, a bug in wiim home app

Off to bed now, I'll try tomorrow
I'll try playing it in VLC as well.

 

[canard]

You're talking about lossy compression (in this case, strong)... right?
NNont FLAC, etc.

Wiim handles AAC "plus"? (and MP3 Pro?)

 

[slartibartfast]

You're talking about lossy compression (in this case, strong)... right?
NNont FLAC, etc.

Wiim handles AAC "plus"? (and MP3 Pro?)

I think AAC decoders can handle AAC-LC and HE-AAC (AAC+).

 

[canard]

I think AAC decoders can handle AAC-LC and HE-AAC (AAC+).

wiim says it or has it been tested and verified by some here?
;-)
(do we have an exhaustive list of compressions managed by the wiim?)

 

[slartibartfast]

wiim says it or has it been tested and verified by some here?
;-)
(do we have an exhaustive list of compressions managed by the wiim?)

AAC+ has been around since 2003 so why would a modern AAC decoder not include it. Surely if it plays it must be supported.

 

[canard]

AAC+ has been around since 2003 so why would a modern AAC decoder not include it. Surely if it plays it must be supported.

This is certainly the case for AAC+ (MPG Pro?)...

but if the list exists, I would like to find it....

;-)....

 

[hipoagumol]

This is certainly the case for AAC+ (MPG Pro?)...

but if the list exists, I would like to find it....

;-)....
(AAC "plus" seems dedicated to improving, subjectively, very low flux a little... like here, or DAB+ streams (limited to 88k in my country somes flux 96k in swiss) etc....
but for example the 192 AAC streams in my case avoid "SBR"... Even if disappointing and insufficient for acoustic music, it still seems preferable to tinkering with SBR on low flux, disaster sorry)

https://forum.wiimhome.com/threads/tech-tuesday-audio-codecs-demystified-🔊.8064/

 

[canard]

https://forum.wiimhome.com/threads/tech-tuesday-audio-codecs-demystified-.8064/

Thanks ;-)

(but not too detailed ;-) )
(There are plenty of advantages to DAB+, (your 96 aac+)... for cooking, cars etc , but the abandonment of the idea of audio quality is obvious (around me, 88k max, it seems that sometimes, like in Switzerland a few 96k, in Germany?...)... some music supports it... for others... a disaster...
It's a strange evolution when, at the same time, people are demanding 192k/24kHz HD (even if it's just a tinkering)...
as an intellectual shortcut with video and the sale of 4k, 8k, 12k, etc.)

 

[hipoagumol]

Thanks ;-)

(but not too detailed ;-) )
(There are plenty of advantages to DAB+, (your 96 aac+)... for cooking, cars etc , but the abandonment of the idea of audio quality is obvious (around me, 88k max, it seems that sometimes, like in Switzerland a few 96k, in Germany?...)... some music supports it... for others... a disaster...
It's a strange evolution when, at the same time, people are demanding 192k/24kHz HD (even if it's just a tinkering)...
as an intellectual shortcut with video and the sale of 4k, 8k, 12k, etc.)

Well, that depends on the radio station. There's plenty of streams out there with high quality compression codecs. You can find BBC at 320Kbps standard AAC

UK and Irish Radio Stations for Android - RadioFeeds UK & Ireland

Listen live to radio stations from the UK and Ireland on your Android phone or tablet.

www.radiofeeds.co.uk

Example bb3 classical at full AAC 320kbps 24B/48khz.

http://lsn.lv/bbcradio.m3u8?station=bbc_radio_three&bitrate=320000

FMSTREAM - The Radio Stream Directory

fmstream.org

Sometimes it's hard to find the right url and there are many discrepancies around there. Sometimes even tweaking the url suffix works!(some url expose the bitrate requested and changing it sometimes works)

 

[canard]

Well, that depends on the radio station. There's plenty of streams out there with high quality compression codecs. You can find BBC at 320Kbps standard AAC

UK and Irish Radio Stations for Android - RadioFeeds UK & Ireland

Listen live to radio stations from the UK and Ireland on your Android phone or tablet.

www.radiofeeds.co.uk

Example bb3 classical at full AAC 320kbps 24B/48khz.

http://lsn.lv/bbcradio.m3u8?station=bbc_radio_three&bitrate=320000

FMSTREAM - The Radio Stream Directory

fmstream.org

Sometimes it's hard to find the right url and there are many discrepancies around there. Sometimes even tweaking the url suffix works!(some url expose the bitrate requested and changing it sometimes works)

I know there are 320 flac streams etc... just my point "blabla" about forcing through DAB+, the case in my country, lousy audio rating "sold..." "digital quality"... AAC 192 VBR is already too limited...

(thanks for the BBC stream..I thought there were restrictions for outside the UK )

(Aac+ is use for limited quality audio/ small flux...)

 

[slartibartfast]

Sure! But please give a try to open directly the URL from Open Network Stream option in wiim home app and tell us what you see.. this Lyrion is integrated through Squeezelite right, maybe that is the cause... or maybe it is as you said, a bug in wiim home app

OK I tried open network stream and it did say 24/48. I also tried BBC Five Live in open network stream and this was also reported as 24/48. I don't think the BBC are streaming 24 bit.

https://lsn.lv/bbcradio.m3u8?station=bbc_radio_five_live_sports_extra&bitrate=320000&uk=1

 

[canard]

https://garfnet.org.uk/download/radio/bbc-radio.txt