Great suggestions, thanks so much. I definitely want to keep the app simple UI-wise, so it's going to be a challenge!

Right, it's not optimized for mobile at all — definitely on the to-do list.

That's a good point! I did consider this but decided against it since the share URLs would be pretty long.

Instead I went with a S3 based storage solution — still pretty simple, not managing any servers or databases manually.

Thanks! I may be biased but I like Unix composability principles :)

Unless you plan to forever update your credit card on AWS, it can be better to develop without cloud and use one or more url shorteners to share (socials do it anyway).

Yes, it makes a lot of sense to open source it — will do in a day or two!

Thank you! I noticed on my iPhone that if it's on silent, the audio doesn't play — that could be it.

I can confirm this. It’s definitely not expected! I turned my audio volume all the way up and heard nothing. I shouldn’t need to turn on my phone ringer (and wouldn’t ever think to do so!) to hear a drum machine on a website.

Huh! I love how you can switch between instruments on each track, that's a great idea.

Have you tried Tone.js vs Howler? Any thoughts?

Interesting, I didn't come across Tone.js until now. It looks like it handles a few more things than Howler. Most useful for the drum machine would be scheduling. I'm just using setInterval, which isn't guaranteed to be accurate, but seems good enough for my use case.

I want to build some other browser based audio/synth tools. I'll have dig into Tone.js more for one of those, thanks. I'm re-learning to code with these projects, but the goal is to build a multiplayer web-based modular synth.

Yooo... MY PEOPLE!!!

I am working on building a web based modular synth I can sequence with/use to sequence my real life modular synth.

I want to be able to live stream my real life synth patches and allow people to mess with some CV paramaters in the browser.

Where can I follow your work?

Oh yeah, adding to my to-do list!

If you're willing to go a bit further, i recommend adding a "groove" cursor, that slightly shift each box within the beat, at random (then you can have more complex algorithm to make the randomisation move the beat toward a ternary rythm instead of completely at random). It's called "humanize" in some audio software and can be fun (if you feel like putting one cursor per track, that's even better).

Or follow the swing recipe from "Roger Linn on Swing, Groove and the Magic of the MPC's Timing (2013)":

https://www.attackmagazine.com/features/interview/roger-linn...

as previously discussed on HN (https://news.ycombinator.com/item?id=34425861).

That's awesome to hear, and thanks so much for the detailed feedback. Really appreciate it!

AH! yeah in my chrome it didn't work at all. i was super confused how the example got the little dots and what they meant.

Makes a ton of sense — will add to my list!

Zeplin currently only supports Sketch as a design tool, which is also Mac only. Using our Mac app (and our Sketch plugin) designers upload the designs. We also have a web app (for developers not using Macs), where you can access the uploaded designs: app.zeplin.io