[#FP-853] Gross distortion on the first second of audio playback with 22,050, less than 192kbps, MP3 files

Flash Player

Gross distortion on the first second of audio playback with 22,050, less than 192kbps, MP3 files

Created: 10/27/08 06:13 PM Updated: 12/15/08 02:34 PM

Component/s:

Sound Playback

Security Level:

Public (All JIRA Users )

File Attachments:

bug.zip (1.39 Mb)

Issue Links:

Cloners

This issue is cloned by:
	~~FP-862~~ songs with higher than 44KHz sampling...

Severity:	Performance
Reproducibility:	Every Time
Discoverability:	High
Found in Version:	Flash Player 10 - 10_0_12_36
Affected OS(s):	All OS Platforms - All
Steps to Reproduce:	« Hide Steps to reproduce: 1. Find a stereo 22050 MP3 file encoded at less than 192kbps. (I used a 90 second audio file for my tests) 2. Create an AS2 FLA. Include on first frame ... var audioTrack = new Sound(); audioTrack.loadSound("audio.mp3", true); 3. Preview resulting HTML/SWF in browser with FP 10 I've attached my test files as a zip. Actual Results: Gross distortion on the first second or so of audio playback I confirmed this on Mac 10.5, Mac 10.4, and Windows XP. Expected Results: No distortion on playback. Workaround (if any): Use a sampling rate other than 22,050 Hz, or use a bitrate 192 kbps or higher Show » Steps to reproduce: 1. Find a stereo 22050 MP3 file encoded at less than 192kbps. (I used a 90 second audio file for my tests) 2. Create an AS2 FLA. Include on first frame ... var audioTrack = new Sound(); audioTrack.loadSound("audio.mp3", true); 3. Preview resulting HTML/SWF in browser with FP 10 I've attached my test files as a zip. Actual Results: Gross distortion on the first second or so of audio playback I confirmed this on Mac 10.5, Mac 10.4, and Windows XP. Expected Results: No distortion on playback. Workaround (if any): Use a sampling rate other than 22,050 Hz, or use a bitrate 192 kbps or higher
Language Found:	English
Bugbase Id:	none
Resolved by:	Charles Liss
Participants:	Charles Liss, Joe, Mark Carlson and Mark Yudt

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Comments

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Mark Yudt - [10/28/08 02:40 PM ]

I have built a flash audio streaming player and found that my mp3's that had a bit rate of 128kbps and audio sample rate of 48khz would have horrable distortion through the whole song. Once I changed the audio sample rate to 44khz the song plays fine. I found this issue to only be with the flash plugin 10.0.12.36

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Mark Carlson - [11/17/08 01:04 PM ]

I've experienced this problem as well in Vista & XP, both IE and FF. It appears independent of OS or browser. Audio plays fine in FP 6 through 9. But FP10,0,12,36, I hear about a second of distortion on some mp3 files encoded at 64kbps, 22050hz. Probably related to the codec used to create the file. I have noticed that I can get that distortion to disappear if I encode the mp3 using a legacy codec, even at 64kpbs, 22050hz.

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Charles Liss - [12/15/08 02:33 PM ]

This is a duplicate of a issue we are aware of.

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Charles Liss - [12/15/08 02:34 PM ]

We are aware of this issue. Thank you for the great report.