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Topic: Recommended LAME settings for: AMR to MP3 (Read 8609 times) previous topic - next topic
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Recommended LAME settings for: AMR to MP3

I don't know the best settings.
So, what's the best settings do you recommend?
What bit dept, bitrates & sample rate?
16Bit. 128KBPS, 48000?

Recommended LAME settings for: AMR to MP3

Reply #1 –
What is AMR?
FB2K,APE&LAME

Recommended LAME settings for: AMR to MP3

Reply #3 –
If I must, I transcode to LAME -V2, whatever the source be.
"Listen to me...
Never take unsolicited advice..."

Recommended LAME settings for: AMR to MP3

Reply #4 –
According to the WIKI, "Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to 200-3400 Hz.". I think that LAME at -V2 might be a tad overkill. Try -V9 or ABR/CBR64 or 80 and see if you can ABX it.

Cheers, Slipstreem. 

Recommended LAME settings for: AMR to MP3

Reply #5 –
On first impression, -V2 seems overkill. AMR files are heavily lowpassed mono files. I'm pretty sure LAME won't bloat the output file as compared to CD encodes (like if it averages ~192 kbps or higher, AMR transcoded to -V2 would be ~96 or lower, owing to the mono source).

I may be wrong, I'll try to post quick tests just the same. Will compare with -V9 as well.

EDIT: Just finished transcoding 30s samples to -V2 and -V9 (with 106kbps/44kHz and 47kbps/22kHz respectively). Didn't bother to ABX. -V9 is the better option for this job.
"Listen to me...
Never take unsolicited advice..."

Recommended LAME settings for: AMR to MP3

Reply #6 –
Guys... what will happening if U convert AMR to 16bit, 48000, stereo?
Does it make the quality better?

Recommended LAME settings for: AMR to MP3

Reply #7 –
Quote from: CPKTV on
Guys... what will happening if U convert AMR to 16bit, 48000, stereo?
Does it make the quality better?

That's a joke, right?
 

Recommended LAME settings for: AMR to MP3

Reply #8 –
what do you recommend?

Recommended LAME settings for: AMR to MP3

Reply #9 –
Quote from: CPKTV on
Guys... what will happening if U convert AMR to 16bit, 48000, stereo?
Does it make the quality better?

I'm sorry, maybe I misunderstood. Better than what?

Recommended LAME settings for: AMR to MP3

Reply #10 –
original quality...
what settings do you use for converting 13Bit, 8KHz, 4.75~12.2KBS to MP3 for best quality?

Recommended LAME settings for: AMR to MP3

Reply #11 –
People have been giving you recommendations, you obviously aren't listening.  Try -V 9 with Lame or a low average bitrate setting (32 to 90kbps) and see if you can ABX the transcoded files.

You serve no benefit going up to 16 bit 48KHz encoding.  That would be pointless and could actually introduce new encoding artifacts.  Just let Lame do its thing without trying to change the bit depth or frequency.

Recommended LAME settings for: AMR to MP3

Reply #12 –
ok, so -V 9... thanks.

Recommended LAME settings for: AMR to MP3

Reply #13 –
Code: [Select]
lame -V 8 --vbr-new -mm --resample 22.05 --lowpass 11
That is what I do. Low pass could probably be set lower.

Recommended LAME settings for: AMR to MP3

Reply #14 –
Quote from: 12345 on
Code: [Select]
lame -V 8 --vbr-new -mm --resample 22.05 --lowpass 11
That is what I do. Low pass could probably be set lower.


is this the best settings?