# HLS audio issue

**URL:** <https://community.wowza.com/t/hls-audio-issue/40601>\
**Category:** Wowza Streaming Engine\
**Created:** [January 25, 2015, 8:35pm UTC](https://community.wowza.com/t/hls-audio-issue/40601 "2015-01-25T20:35:34Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Luis\_Muniz](https://avatars.discourse-cdn.com/v4/letter/l/df788c/32.png) [@Luis\_Muniz](https://community.wowza.com/u/Luis_Muniz)\
**Post date:** [January 25, 2015, 8:35pm UTC](https://community.wowza.com/t/hls-audio-issue/40601/1 "2015-01-25T20:35:34Z")

</div>

Hello!

I followed step by step [this link](https://www.wowza.com/docs/how-to-configure-apple-hls-packetization-cupertinostreaming%28cupertinostreaming%29) and many different combinations, but no success:

cupertinoChunkDurationTarget: 2000, 4000 or 8000 (keyframe multiple)

cupertinoMaxChunkCount: 6, 8, 10, …

cupertinoPlaylistChunkCount: 3, 4, 5, 6, 7, …

[PHP]

#EXTM3U

#EXT-X-VERSION:3

#EXT-X-STREAM-INF:BANDWIDTH=558041,CODECS=“avc1.66.30,mp4a.40.34”,RESOLUTION=448x252

chunklist\_w1750922646.m3u8

…

#EXTM3U

#EXT-X-VERSION:3

#EXT-X-ALLOW-CACHE:NO

#EXT-X-TARGETDURATION:9

#EXT-X-MEDIA-SEQUENCE:1

#EXTINF:4.102,

media\_w1750922646\_1.ts

#EXTINF:8.203,

media\_w1750922646\_2.ts

#EXTINF:8.203,

media\_w1750922646\_3.ts

[/PHP]

[Performance Tuning](https://www.wowza.com/docs/general-tuning) was done.

My HLS stream is stuttering and fast rewind sometimes. The same streaming is great by RTMP. I’ve tested with Android, Iphone and Windows VLC.

H.264 Video info: profile:Baseline, level:3.0, frameSize:448x252, frameRate:30.0, keyframe frequency: 2s, 440 Kbps

MP3 Audio info: 44100Hz Mono 64Kbps (and yes, I’ve tested with AAC, same results)

Wowza 4.1.1

Network bandwidth is no problem, 1Gbps dedicated and low use (\< 1%).

My local connection is pretty good (35 Mbps / 5 Mbps) Wifi for mobiles is N type.

Note 1: When Wowza is terminated, the streamings still running by some seconds until finish. So, buffering and download is OK, but no smoth sound (micro stops, rewinds and strange sounds)

Note 2: The video does not seem to be affected.

Note 3: I’ve published with FMLE, Wirecast and OBS, using webcam (Video and Audio), capture cards (osprey) and direct audio.

I’ve no idea what try anymore, please, help me!

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<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [January 26, 2015, 9:05am UTC](https://community.wowza.com/t/hls-audio-issue/40601/2 "2015-01-26T09:05:51Z")

</div>

Hi there.

For MP3 audio over HLS you should be using 128kbs, 44100hz stereo. AAC is a better choice as Android does not support MP3 as for as I am aware.

Can you re-start Wowza in stand-alone mode [install-dir]/bin/startup.bat|startup.sh. This will open the console window and log server events, errors and warnings to the console.

If nothing stands out in the output, you may decide to open a ticket with the support team. To do so please zip your /conf and /logs folders. Send these along with a screen capture of your encoder settings, a link to a sample stream for testing and a link to this thread as a reference.

Kind regards,

Salvadore

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<div class="post-metadata">

**Author:** ![Luis\_Muniz](https://avatars.discourse-cdn.com/v4/letter/l/df788c/32.png) [@Luis\_Muniz](https://community.wowza.com/u/Luis_Muniz)\
**Post date:** [January 26, 2015, 2:26pm UTC](https://community.wowza.com/t/hls-audio-issue/40601/3 "2015-01-26T14:26:21Z")

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> For MP3 audio over HLS you should be using 128kbs, 44100hz stereo. AAC is a better choice as Android does not support MP3 as for as I am aware.

I’ve tested with. MP3 128Kbps 44100 and AAC, and various combinations others.

I currently into testing, wowza runs under console mode. No errors there.

Thanks!

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<div class="post-metadata">

**Author:** ![Paul\_Shields](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/paul_shields/32/390_2.png) [@Paul\_Shields](https://community.wowza.com/u/Paul_Shields)\
**Post date:** [January 27, 2015, 12:54pm UTC](https://community.wowza.com/t/hls-audio-issue/40601/4 "2015-01-27T12:54:02Z")

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Hi,

Just to confirm we have this logged with our ticketing system, reference #116236. We shall continue to investigate and update you from there.

Paul