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Author Topic: Problems with mono recording using LAME  (Read 1667 times)

Shadowen

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Problems with mono recording using LAME
« on: September 03, 2005, 05:05:24 pm »

Hello,

I am having problems recording from the Line-in input directly into a mono 8kb/s file using the MP3 Encoder in MC11.

I have gone into Encoding->Sound Recorder settings and specified a custom command-line argument with the MP3 Encoder to be -m m -b 8.

According to the documentation for the LAME encoder, the -m m option forces the mode to be monaural and the -b 8 option forces a constant bitrate of 8.

However, MC does not appear to be adhering to these command-line options during the encoding process.  Could there be an issue with MC in this regard?

I am confident that these options are correct, because I have made the exact same settings under the Encoder->File Conversion settings and they work as expected when converting files.
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KingSparta

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Re: Problems with mono recording using LAME
« Reply #1 on: September 03, 2005, 05:09:41 pm »

I never have gotten Lame to record in mono correctly

I don't know if it is Lame Or MC
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GHammer

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Re: Problems with mono recording using LAME
« Reply #2 on: September 03, 2005, 11:50:15 pm »

Try this command line.

--preset voice --resample 16 -b 8 -a -m m -h --lowpass 4 --highpass 1200

I'm guessing you are trying to record voice from your explanation.

That was to show how to set sampling, cutoffs, etc.

A simple way is to just use the --preset voice option which will result in a mono recording as well. The preset may work where other switches do not in recording. But if switches are not being passed, then it is a problem of course.
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Shadowen

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Re: Problems with mono recording using LAME
« Reply #3 on: September 04, 2005, 08:32:01 am »

That still did not work.

As with my settings, when made under the Encoder->File Conversion section it works as desired and when it is set under the Encoder->Sound Recorder it does not work correctly. 

Knowing this limitation, I realize that I can always re-encode it after I capture it, I was just really hoping that MC would be able to do it during the capture process to eliminate one extra step.
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Shadowen

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Re: Problems with mono recording using LAME
« Reply #4 on: September 04, 2005, 09:04:27 am »

It seems that JRiver might be aware of a BUG with the Sound Recorder after all.  I came across this post on the site today.
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GHammer

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Re: Problems with mono recording using LAME
« Reply #5 on: September 04, 2005, 10:54:21 am »

Quote
Sorry, but the sound recorder only outputs 16 bit 44.1khz files currently.

I wonder why resampling doesn't work then?
I understand that is what it is sending to the record process.
Why can't LAME resample as it is told?
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KingSparta

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Re: Problems with mono recording using LAME
« Reply #6 on: September 04, 2005, 02:14:54 pm »

this problem is as old as rune stones

most people never see it
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