Howard, the key to this isn't bass/treble but rather it is what are called
formants which are the frequencies of different voice components. This is why
simple frequency enhancement does not necessarily work.
Tom
Tom Brennan KD5VIJ, CCC-A/SLP
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html
On Mon, 27 Feb 2012, Howard Kaufman wrote:
> Date: Mon, 27 Feb 2012 08:51:29 -0600
> From: Howard Kaufman <[log in to unmask]>
> Reply-To: For blind ham radio operators <[log in to unmask]>
> To: [log in to unmask]
> Subject: Re: OT victor reader stream
>
> I get it for Samantha and Tom, but not for human voices. The ability to
> change base and trebble is more likely to help people with hearing
> difficulties, since they can compensate for frequency loss. Most people
> hear male voices better. The new pitch option doesn't turn a female voice
> in to a male voice, even at the lowest setting.
>