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Subject: Re: Playback Speed/Pitch

Re: Playback Speed/Pitch

From: Grant Hardy <>
Date: Sat, 6 Jan 2007 21:12:35 -0800


As a matter of fact, I was not at all confused. I am very well aware that
2% speed adjustment without altering pitch has not ever been possible.
However, the original poster mentioned something to do with a "2%..."
feature, and although I knew it had nothing to do with the topic for
discussion, I was curious about what feature they were referring to.
There's no need to yell at the original poster; it was clearly just a
misunderstanding and it in fact taught me another feature in Rockbox that I
had no idea existed.

----- Original Message -----
From: "Dominik Riebeling" <>
To: "Rockbox" <>
Sent: Saturday, January 06, 2007 3:49 PM
Subject: Re: Playback Speed/Pitch

> On 1/7/07, Michael DiFebbo <> wrote:
>> Grant Hardy wrote:
>> > What is this 2% thing? I don't really understand where you'd use it.
>> There is no "2% thing." The original poster said that
> Exactly *this* is the reason why I asked the OP to not tell wrong
> facts like they were true. It causes confusion about *the users*.
> When you read the manual you'll find out there are two ways to affect
> the pitch: you can change the pitch by using the up / down button.
> This will change the pitch in 0.1% steps (with increasing steps as you
> hold the button longer). These values are sticky, i.e. they remain
> after you let go of the button.
> The second way is to use the left / right buttons. Those will change
> the pitch by exactly 2% of the current setting, that value will be
> never anything else than 2% and it is *not* sticky. I.e. after letting
> go the button the pitch value will go back to the value you had before
> pressing the left / right button. This is intended for beat matching
> and intended to work exactly this way.
> A short scenario: you are playing music with say two h100 devices.
> Both are hooked up to a mixer, and you fade from player A to the other
> B. Now A plays a song. You want to smoothly fade into B. You changed
> the pitch so the beats of both songs have the same speed. Now, say B
> is 1/2 tick off of the beats of A. This is where beat matching is
> needed. You nudge the playback of B by increasing the playback speed
> only a little and change back to the original pitch as soon as the
> beats match. For this you need some pitch modify function that is not
> sticky, and that is the "2% thingy". It's giving the music a small
> nudge to match the beats.
> Nudging is in no way different to the pitch change Rockbox does. It is
> only a non-sticky mode with a fixed value.
> I hope this is now cleared completely. Changing the speed without
> affecting the music tone (aka timestretching) or changing the music's
> tone without affecting the playback speed (aka pitch shifting) has
> been requested several times but it is currently not possible.
> Btw, the buttons I refered in this mail are the ones for h100 series.
> For other players please look them up in the manual.
> - Dominik
Received on 2007-01-07

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