Show HN: A singing synthesizer for the browser with automatic 3-part harmony

[_nivlac_]

I've also enjoyed Google's blob opera, for something similar!

https://artsandculture.google.com/experiment/blob-opera/AAHW...

[modeless]

And the original singing mouths made by the same guy: https://www.adultswim.com/etcetera/choir/

[smusamashah]

Also pink trombone https://dood.al/pinktrombone/

[Bluestein]

Not to nitpick, but, it being "Arts & Culture" and all, they could've at least said opera aria ...

... not song.-

[zebproj]

Thanks everyone for the suggestions and kind words.

Some details:

The source code for this project can be found on github [0].

I am using an AudioWorklet node with custom DSP using Rust/WebAssembly. Graphics are just done with the Canvas API. The voice leading is done algorithmically using a state machine with some heuristics.

The underlying DSP algorithm is a physical model of the human voice, similar to the model you'd find in Pink Trombone [1], but with some added improvements. The DSP code for that is a small crate [2] I've been working on just for singing synthesizers based on previous work I've done.

0: https://github.com/paulBatchelor/trio

1: https://dood.al/pinktrombone/

2: https://github.com/PaulBatchelor/voxbox

[atech4826]

Dear zebproj,

Apologies for the late comment, but I had a query I wanted to share.

Would it be possible for you to create a tool that allows users to mimic human emotional sounds directly in the browser? I’m thinking of sounds like realistic coughs, sighs, gasps, and other vocal expressions like shouting or crying etc . It would be amazing if the tool could optionally incorporate TTS, but even without it, the functionality would be very valuable for content creators or people who need custom sound effects.

The idea is to let users customize these sounds by adjusting parameters such as intensity, pitch, and duration. It could also include variations for emotional contexts, like a sad sigh, a relieved sigh, a startled gasp, or a soft cough. An intuitive interface with sliders and buttons to tweak and preview sounds in real-time would make it super user-friendly, with options to save or export the generated audio much like the project pinktrombone

I’m quite new to this field and only have basic experience with HTML, CSS, and JavaScript. However, I am very much interested in this area and I was wondering if this is something that could be achieved using tools like CursorAI or similar AI-based solutions? Or better yet, is it possible for you to create something like this for people like me who aren’t very tech-savvy?

Thank you so much

[butz]

Add "display:block;" to canvas to fix the issue with vertical scroll appearing. Also, you might want to consider looking into vh and vw units to fill canvas to viewport without using javascript.

[skykooler]

Is there a reason to avoid using javascript for canvas layout considering you need javascript to draw on the canvas in the first place?

[zebproj]

Thanks, I'll look into it

[hunter2_]

95% of the time, I can only get 1 voice at a time. 5% of the time, I can get 2 or 3 voices at a time (1 variable pitch, the others fixed pitch) but I have no idea what input causes this rare behavior. Can you add some help text explaining what various input sequences will achieve?

Android Chrome with touch input (Pixel 8 Pro).

[zebproj]

A tutorial would be helpful.

Holding down a note and waiting will cause a second, then a third not to appear. When you move your held, note to another pitch, the other pitches will follow, but with a bit of delay. This produces what is known as staggered voice leading, and produces interesting "in-between" chords.

[smusamashah]

This is awesome fun. Reminds of Google Blog Opera and Pink Trombone.

Can we have multiple voices when using multiple fingers please?

Edit: I can't sing or play music but this is making me feel like I am making someone sing nicely, it's relatively lot easy to play with.

[kitshunt]

Source code is here: https://github.com/PaulBatchelor/Trio

It's written in JavaScript and Rust (compiled to WASM).

[brunorsini]

Fun! I'd love the option to increase (double?) range. It would sacrifice precision somewhat, so a toggle would be ideal.

A toggle for quickly visualizing notes would also be useful, as well as keyboard shortcuts — perhaps while one clicks the mouse on a given note, pressing the keyboard shortcut for another specific note gradually moves pitch in that direction, with programmable speed.

[brunorsini]

Oh, and clicking multiple times at the leftmost portion of the instrument (around 1/4th from the top) sounds exactly like Laurie Anderson's classic "O Superman" :)

[zellyn]

This is so fun. One note: on iOS Safari on my iPhone, it really believes I’m trying to select everything, do drag and drop, etc. I’m sure someone here knows the proper CSS incantation.

[ldenoue]

This thing is amazing can you add recording?

Perhaps some samples you or visitors create?

Then add a little sampler for beat and it’s a fantastic tool

[vunderba]

Very neat. Side note, but one of the more fun aspects of Garageband on the iPad is that you can load string instruments such as an Erhu and play it by physically sliding your finger along the string in a very similar way.

[fhackenberger]

This is such a great way to practice! Thank you for creating it! Could you perhaps add pitch indicators on the side and multi touch support? Or maybe it's open source?

[ycombiredd]

in Chrome, on my iphone, I can get a cool effect that looks like a glitch, but I wonder if it is a feature. If I hold a note a certain way, where the browser does a “select all”, and then drag my thumb, it drags a thumbnail of the page. When I release it, it keeps the first note and starts a new one using the new position of my thumb. I can create my own harmonies this way instead of the default parts that appear when I hold the note in place.

[joshuaheard]

This is awesome! It would be great if you could record a snippet then layer your recordings.

[MarkusWandel]

Does anyone make a USB Midi Theremin? That would totally be the right front end for this one!

[vunderba]

Moog does - I've combined it with a midi translator app to customize midi (CC, etc) so that I can use it as an expression input to SWAM physically modeled instruments like violin.

https://www.moogmusic.com/products/etherwave-theremins/there...

[varunneal]

so beautiful. I can imagine using this a lot if some buttons are added (start/stop harmony, view note/resonance, etc). great job

[makapuf]

I'm sorry but I can see a small keyboard with selected notes, can some one describe what makes it 3 parts harmony ? Is it a song thing ? Some chord thing ? There is no description on the site or the github repo.

[blaufast]

Neat!