the best setting for lame for voice

C:\WINDOWS>lame --preset help
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Presets are shortcuts for common or carefully tuned settings.
Several separate collections of preset profiles are available.
For more preset details, refer to --preset longhelp.

basic- presets covering a wide span (fixed rates unless used with -v or VBR):
phone (16 kbps) mw-us (40 kbps) radio (128 kbps) studio (256 kbps)
phon+ (24 kbps) sw (24 kbps) tape (128 kbps)
lw (24 kbps) fm (112 kbps) hifi (160 kbps)
mw-eu (24 kbps) voice (56 kbps) cd (192 kbps)

alt- presets highly tuned for utmost quality via blind listening tests:
VBR presets for steady quality
--alt-preset standard
--alt-preset extreme
--alt-preset insane
ABR presets for best quality at a given average bitrate:
--alt-preset <bitrate value>
 
I found that I could get adequate voice-quality results at 8kbps - if I forced the sample to 22k, selected mono, --nspsytune and --athtype 3

16kbps was ample, but do NOT allow it to select a wooly 11k or 8k sample rate - force it out to 16k or 22k

(I used razorlame to set the parameters - there are a good many other lame frontends as well)

I'll have to check out those presets though

PS. there is also --alt-preset CBR <bitrate>
If you need CBR.

PPS. Probably of no significance here, but it's a good idea to stick to 11k, 22k and 44k sample rates, as the lower 2 will resample to CD a lot more easily tham 8k, 16k and 32k - and if you may want to go audio CD "on the fly", best to stick to CBR as many programs make a complete hash of VBR (and probably ABR too).
 
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