Keyword

MP3s sound like chipmunks!

  • directtech
  • directtech's Avatar Topic Author
  • Offline
  • New Member
More
17 years 11 months ago #2202 by directtech
MP3s sound like chipmunks! was created by directtech
I have successfully used this plugin on many sites, but I have a client who is having MP3 issues. The MP3 will load and play, but it sounds like chipmunks. Can you tell me why this is happening?? THanks.

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2203 by michel12
Replied by michel12 on topic Re: MP3s sound like chipmunks!
I have the same problem, when mp3 is coded by Lame everything is ok. But when coded by Fraunhofer the mp3 play's at double speed, i hope there will be a bug fix for this problem.

Besides that, AllVideos Plugin is really cool!

Greetings, Michel

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2204 by JoomlaWorks
Replied by JoomlaWorks on topic Re: MP3s sound like chipmunks!
The problem is not with the codec used. The MP3s must NOT be encoded in Variable Bit Rate (VBR). They SHOYLD be encoded in Constant Bit Rate (CBR) mode.  ;)

BTW, LAME is the best codec out there :)

Fotis / JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)

Please Log in or Create an account to join the conversation.

  • directtech
  • directtech's Avatar Topic Author
  • Offline
  • New Member
More
17 years 11 months ago #2205 by directtech
Replied by directtech on topic Re: MP3s sound like chipmunks!
The client is using WavePad, importing CD track, converting to MP3 16bit mono constant bit rate.  NOT using VBR.  Any other ideas?

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2206 by michel12
Replied by michel12 on topic Re: MP3s sound like chipmunks!
Thanx for you're reaction, I'll try to not encode in VBR  :)

Greetings, Michel

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2207 by JoomlaWorks
Replied by JoomlaWorks on topic Re: MP3s sound like chipmunks!

The client is using WavePad, importing CD track, converting to MP3 16bit mono constant bit rate.  NOT using VBR.  Any other ideas?


What bitrate are they using? Is it too high?

Fotis / JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)

Please Log in or Create an account to join the conversation.

  • directtech
  • directtech's Avatar Topic Author
  • Offline
  • New Member
More
17 years 11 months ago #2208 by directtech
Replied by directtech on topic Re: MP3s sound like chipmunks!
He used 16kbps to keep the file size down.  It is just talking, no music.  Could it be too low??

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2209 by JoomlaWorks
Replied by JoomlaWorks on topic Re: MP3s sound like chipmunks!
Hmm, perhaps. Try 36 or 48 at least.

Fotis / JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)

Please Log in or Create an account to join the conversation.

  • directtech
  • directtech's Avatar Topic Author
  • Offline
  • New Member
More
17 years 11 months ago #2210 by directtech
Replied by directtech on topic Re: MP3s sound like chipmunks!
Re-encoded at 36bit and it works fine.  Tried another one at 16 and it did the chipmunks again.  I'll have the client stick with 36kbps.  Now we know :)  Thanks for your help.

Please Log in or Create an account to join the conversation.

More
17 years 11 months ago #2211 by michel12
Replied by michel12 on topic Re: MP3s sound like chipmunks!
Hi, i've tested some different bitrates (Lame). Some of the bitrates are playing to fast (like chipmunks), most of them play ok. I hope there will be a bugfix for this problem in the future.

Here are the results:

#!/bin/bash

#Source file
SF=./test.wav

# -r    Assume  the  input  file  is  raw  pcm
# -m j  Joint-stereo
# -m m  Mono
# -a    Mix the stereo input file to mono
# -b xx  Bitrate
# --abr  Average bitrate


lame -a  -b 16    $SF test-b16-a.mp3 //ok
lame -m m --abr 16 $SF test-abr16-m.mp3 //ok
lame -a  --abr 16 $SF test-abr16-a.mp3 //ok

lame -a  --abr 24 $SF test-abr24-a.mp3 //plays to fast

lame      -b 32    $SF test-b32.mp3 //ok
lame      --abr 32 $SF test-abr32.mp3 //ok
lame -a  --abr 32 $SF test-abr32-a.mp3 //ok

lame      --abr 40 $SF test-abr40.mp3 //plays to fast
lame      --abr 56 $SF test-abr56.mp3 //ok
lame      --abr 64 $SF test-abr64.mp3 //ok
lame      --abr 96 $SF test-abr96.mp3 //plays to fast

lame      -b 96    $SF test-b96.mp3  //plays to fast
lame      $SF test.mp3 //ok

Greetings, Michel

Please Log in or Create an account to join the conversation.

More
17 years 10 months ago - 17 years 10 months ago #2212 by jcarnley
Replied by jcarnley on topic Re: MP3s sound like chipmunks!
Just so you know I used about twenty different MP3 files and so far only two are giving me problems.  It didn't happen until I started loading them in docman but I don't see how that could be the problems since others work fine.  I am also reasonable sure the files that are sounding funny used to sound fine.

Okay I went back and checked I may have had the bitrates wrong on four of the most recent MP3 files I converted.  I'm not having trouble with any others so it must be the bitrate.

Please Log in or Create an account to join the conversation.

More
17 years 9 months ago #2213 by chalupa
Replied by chalupa on topic Re: MP3s sound like chipmunks!
I just started having similar problems.  I recorded a skype call using PrettyMay.  I just checked the recording settings and they are:
Sample Rate - 32000Hz
BitRate - 64kbps

It plays fine normally, just not using this plugin.  I then tried to re-save the file several times in Adobe Audition using the Fraunhofer codec.  I've tried 32kbps, 48kbps and 128 kbps with different sample rates.

Each time I try to play the different files on my site I get the same result.  Any ideas?

Please Log in or Create an account to join the conversation.

More
17 years 9 months ago #2214 by JoomlaWorks
Replied by JoomlaWorks on topic Re: MP3s sound like chipmunks!
Try 44,1Khz for the sample rate and at least 32kbps for bitrate. Always on CBR of course.  :D

Fotis / JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)

Please Log in or Create an account to join the conversation.

More
17 years 9 months ago #2215 by chalupa
Replied by chalupa on topic Re: MP3s sound like chipmunks!
I did check for CBR, I think I forgot to mention that.  I'll try those settings and let you know what happens.  Thanks!

Please Log in or Create an account to join the conversation.

More
17 years 9 months ago #2216 by chalupa
Replied by chalupa on topic Re: MP3s sound like chipmunks!
Upped the sampling rate to 44,100 and it works just fine.  Earlier I wasn't going into the advanced area to change my settings.  Thanks for the help.

Please Log in or Create an account to join the conversation.

More
17 years 8 months ago #2217 by Ralph de Kreij
Replied by Ralph de Kreij on topic Re: MP3s sound like chipmunks!
Hello,

Is there already a solution for this problem. My mp3 are playing to fast.
I cannot change how the mp3's are recorded because they are third party and I use {mp3remote}

Please help....
Will this be fixed in the next 3.0 release?

Please Log in or Create an account to join the conversation.

More
17 years 8 months ago #2218 by garkon
Replied by garkon on topic Re: MP3s sound like chipmunks!
I too had the same problem.  My first time streaming mp3s.  Probably not using the best software to rip from cd, but I had to use a variable bit rate keeping min and max the same and using joint stereo to get correct play back.  All other settings, even at CBR produced the chipmunk effect. 

Maybe if someone has a system that works (ie - listing software and settings used) and posts it, that might eliminate the issue for future users utilizing the mp3 feature of this plugin.

I'm doing the following:

-Software:  [url=http://"http://www.nch.com.au/rip/plus.html"]Express Rip[/url]
-Settings:
VBR
min:16
max:16
quality:4
Channels:joint

For about an hour long voice mp3, this produces a < 7mb file with minimal artifact when listening.  This is probably not the best way to do it, but it worked for me.

If someone else has another solution (windows), I'd love to hear about it so I can utilize a better system.  Thanks.

Please Log in or Create an account to join the conversation.

More
17 years 8 months ago #2219 by jlw
Replied by jlw on topic Re: MP3s sound like chipmunks!
We have over a hundred audio files, which up 'til now have been linked to directly, so that visitors play them with whatever media player they've got.  And never had a problem. 

Now I'm replacing the links with all video plugin tags so that they'll be played and controlled from within our site.  But they play like Alvin and the chipmunks. 

These are all educational lectures, no music.  All created with Goldwave over many years.  All mono.  All 40kbs.  24kHz.  Audio layer-3. 

I do not want to go and redo all these files.  Any solution?  Or just table the plug in for now?

Please Log in or Create an account to join the conversation.


Powered by Kunena Forum