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Show HN: SlideSynth (slidesynth.com)

49 points by amadeuspagel ↗ HN
— Move touch up and down to change frequency, move touch left and right to change volume.

— Tap the logo to loop, tap again to stop looping, tap yet again to cancel the loop.

— Tap the waveform icons to change the waveform.

16 comments

[ 3.3 ms ] story [ 65.9 ms ] thread
harel
This is very cool. I like it that it can handle multiple touch points on my phone and play three notes if I touch with three fingers.
me_bx
The audio does not play on Firefox on linux, and the interactions don't seem to have any effect either.

Warning message in the console:

> An AudioContext was prevented from starting automatically. It must be created or resumed after a user gesture on the page.

On Firefox / android, this works fine.

Apreche
No Audio on Firefox/MacOS either.
[deleted]
(comment deleted)
efilife
Add some attack and release to eliminate the pops when audio starts/stops playing
amadeuspagel
You can have something like attack and release by moving the finger from the right side to the left and back.
efilife
This is not what I mean, when the waveform cuts abruptly (oversimplification) it creates an unwanted mid-high end popping sound. I see that you are new in the world of audio, I would recommend reading about zero-crossings. A very sho0rt attack like 1ms would help
recursive
To get it to work, I have to drag it from a monitor to the laptop screen and then physically touch the screen. Seems like it should probably work with mouse too.

It looks super cool. Reminds me of old winamp plugins.

jensenbox
UI.svelte:36 The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu

Says Chrome on Linux

Unknoob
Does not work on Firefox/Windows 10.