Rockbox.org home
release
dev builds
extras
themes manual
wiki
device status forums
mailing lists
IRC bugs
patches
dev guide



Rockbox mail archive

Subject: Re: the ALDI rockbox?

Re: the ALDI rockbox?

From: Jerry Van Baren <gerald.vanbaren_at_smiths-aerospace.com>
Date: 2005-02-22

Vladimir Pantelic wrote:

[snip]

> No, this is fine. I know that you can change the pitch (and speed) of the
> MAS by changing the crystal frequency setting in the MAS.
>
> But what the M3PO does is not simple pitch shift, the pitch stays the
> same while the speed changes. The M3PO offers a speed setting between
> 0.25x to 20x, this extreme range cannot by achieved by tweaking the crystal
> frequency. (as said, you can "use" the range between 90% and 110%,
> everything else
> does not sound very nice)
>
> Regards,
>
> Vladimir

BC explained it but tersely. Changing the playback speed (e.g. speed it
up) inherently causes a pitch shift up. What the M3PO has is an
additional _software_ algorithm that shifts the pitch the same amount in
the opposite direction (down) which results in no apparent change to the
pitch but faster playback.

gvb
_______________________________________________
http://cool.haxx.se/mailman/listinfo/rockbox
Received on Tue Feb 22 20:14:51 2005


Page was last modified "Jan 10 2012" The Rockbox Crew
aaa