The problem here is that the piano notes are not all the same duration.
Specifically, your chord (chord 60 64 67) is a bit longer:
(rs-frames (chord 60 64 67)) -> 161634 frames
(rs-frames (piano-tone 72)) -> 144000 frames
There are a lot of ways of solving this, including clipping the two sounds to
the same length and using the `assemble` function. but here’s one simple way:
(require rsound)
(require rsound/piano-tones)
(define (chord . notes)
(rs-overlay* (map piano-tone notes)))
(play (rs-append (rs-overlay (chord 60 64 67)
(piano-tone 72))
(rs-overlay (chord 60 65 69)
(piano-tone 72))
(rs-overlay (chord 62 67 71)
(piano-tone 74))
(rs-overlay (chord 64 67 72)
(piano-tone 84))))
(that is, put the append on the outside, and the rs-overlays inside it.)
(Also, yes, I made it a little I-IV-V-I instead of the same chord twice.)
John
> On Dec 7, 2019, at 14:39, wanderley.guimar...@gmail.com wrote:
>
> I started to playing around with rsound while reading its documentation. I
> wrote the following code:
>
> #lang racket
> (require rsound)
> (require rsound/piano-tones)
> (define (chord . notes)
> (rs-overlay* (map piano-tone notes)))
> (play (rs-overlay (rs-append (chord 60 64 67)
> (chord 60 64 67))
> (rs-append (piano-tone 72)
> (piano-tone 72))))
>
> and I was expecting to hear `(piano-tone 72)` on the begin of the two chords.
> The second `(piano-tone 72)` starts few milliseconds after the second chord
> starts.
>
> Can you help me understand why this is happening?
>
> Thanks,
> wander
>
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