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Topic: How to encode MP3 from MONO wav files using LAME 3.97 (Read 5840 times) previous topic - next topic
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How to encode MP3 from MONO wav files using LAME 3.97

I'm using LAME 3.97 with AudioGrabber but AudioGrabber reports it cannot read a (2channel) MONO wav using the LAME encoder.

Anyone know how I can MP3-encode my MONO wav speech files preferably using AudioGrabber?

Thanks in advance!

How to encode MP3 from MONO wav files using LAME 3.97

Reply #1 –
Try some other program to make sure the problem isn't with the files themselves.

Do the files play properly in standard players such as Winamp and foobar2000?
 

How to encode MP3 from MONO wav files using LAME 3.97

Reply #2 –
Quote from: AndyH-ha on
Try some other program to make sure the problem isn't with the files themselves.

Do the files play properly in standard players such as Winamp and foobar2000?


The files were created using Audition 2. They play fine in Winamp. Acutally, Audition can convert these to MP3 using the included encoder, but I prefer LAME.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #3 –
Are you using the command lame -mm [your other settings] file.wav? Since your files apparently contain little to no stereo separation, you may as well encode to mono MP3.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #4 –
Quote from: dv1989 on
Are you using the command lame -mm [your other settings] file.wav? Since your files apparently contain little to no stereo separation, you may as well encode to mono MP3.


I am trying to encode mono wav files (speech lectures) to mono MP3.  I prefer using a Front End GUI (like AudioGrabber) and LAME.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #5 –
What you initially said seemed to suggest that the file(s) were not "physically" mono:

Quote
a (2channel) MONO wav

I can't be of much help at the moment, as I am not familiar with Audiograbber.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #6 –
IIRC, Audiograbber refused to accept any WAVE format except 44100 Hz, 16-bit, stereo. You can use CDex audio CD ripper or a dedicated program like RazorLame as a frontend to lame_enc.dll or lame.exe.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #7 –
Quote from: j7n on
IIRC, Audiograbber refused to accept any WAVE format except 44100 Hz, 16-bit, stereo. You can use CDex audio CD ripper or a dedicated program like RazorLame as a frontend to lame_enc.dll or lame.exe.


I see... so the issue is with AudioGrabber not Lame; that is good news. I will try your reccomendation.

Do you have any experience with Audition 2 .0 using Lame Encoder?

.....Thanks!

How to encode MP3 from MONO wav files using LAME 3.97

Reply #8 –
No, I have not used Audition at all, only briefly tried CoolEdit six years ago. There shouldn't be any problems encoding a WAVe file that has been edited in Audition..

How to encode MP3 from MONO wav files using LAME 3.97

Reply #9 –
What are the wav specifications of your files? Are you trying to mp3 encode 32 bit floating point? If so, you would be better off resampling in Audition  to something more reasonable for speech. I generally find 22050kHz, 16 bit, mono to work very well; sometimes a sample rate of 16000kHz is quite adequate.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #10 –
When encoding to a lossy format you should not decrease the vertical resolution (bits per sample). LAME supports fixed point input up to 32 bits.

How to encode MP3 from MONO wav files using LAME 3.97

Reply #11 –
Quote from: j7n on
When encoding to a lossy format you should not decrease the vertical resolution (bits per sample). LAME supports fixed point input up to 32 bits.


Original wav files are:

Bit Rate: 705 kbps
Audio sample size: 16 bit
Channels 1 (mono)
Audio sample rate 44 kHz
Audio format PCM

Thanks!