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Show HN Pianoboi – displays sheet music as you play your piano

(pianoboi.site)
109 points bcowde | 2 comments | 28 Mar 25 15:55 UTC | HN request time: 0s | source

I made a software library for displaying piano music 7 years back, and recently ported it to the web (which is now easier than even ever).

It displays sheet music as you play, and let's you take snapshots of specific chords, then keeps a running list of chords as keyboard visuals (instead of just displaying sheet music).

Just a simple tool for songwriting/ figuring out songs by ear, or just understanding music key theory (which I'm admittedly a still a beginner at).

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earlyriser ◴[29 Mar 25 13:10 UTC] No.43515245[source]▶
Not sure if you can help me here or someone reading this.

I'm trying to find something to programatically make piano sounds (and record an mp3) based on 2 params midi note and velocity. I'm making a videogame and I need the mp3 piano notes.

I got a free piano sample library, but the sounds start not always at the same microsecond, so I think I need to produce the samples by myself.

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1. darepublic ◴[29 Mar 25 14:30 UTC] No.43515859[source]▶
Can you edit the sound files with ffmpeg to get rid of any empty space before the sound effect?
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2. earlyriser ◴[29 Mar 25 16:37 UTC] No.43516730[source]▶
Yes, I could do that, but I'm not happy also with the quality of the samples and I need to produce more velocities.