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By Chris Wolfe

This app is only available on the App Store for iOS devices.


YUMI:synth is the worlds first realistic sounding bowed string simulator for iOS. All sound generation is completely synthesized, absolutely no samples are used.

You can play two strings at once (at different locations on the scale) and bow manually or automatically. The scale system allows you to quickly define all the playable notes.

Also included are two high quality stereo effect units: ping-pong delay and reverb.

You can easily save/load presets, and backup your presets via iTunes.

To play in Manual mode, touch a string (purple or blue box) while sliding your finger on the bow (yellow box). In Auto mode, the bow slider turns into a slider controlling the volume.

The control under each string allows you to move/zoom your current view of the scale.

What's New in Version 1.1

1) Universal support for iOS 4.0 and greater devices.
2) Improved sound quality.
3) More natural default preset.
4) Removed homepage button on iPad.


iPhone Screenshot 1
iPhone Screenshot 2
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iPhone Screenshot 4
iPad Screenshot 1

Customer Reviews

What it does, it does very well.

While this may feel limited in tone, I'm running it through processors, its saved me money already as I was shopping for ribbon, theremin or ebow hardware, and while I'll probably invest in the hardware at some point, this is a great option for ribbon style sound. A very useful feature is the ability to only show the notes you need on the strip, it makes it much simpler to slide while recording to match notation, instead of just flailing noise. Honestly I'm not a huge fan(yet), of the pressure pad, but you can set it to auto and it sounds great. I'm sure with time I'll appreciate the option to give the sound more of an attack, but I mainly need steady notes.
It really shines when fed through some processors, I won't get specific because I'd rather everyone find their own sounds, but this is excellent, I've already recorded it on one track.

Fun and interesting.

There are a lot of synthesizers of various flavors on iOS, many of which are very innovative and interesting. In this company of interesting software instruments, this one sticks out as trying something really different: physical modeling of a bowed string, as opposed to a different control interface for subtractive synthesis. Christopher Wolfe is to be commended for stepping out into this territory, as being different is always a risk.

Things I would like to see: recording and audio cut/paste support. Vibrato by wiggling a finger (more like how a violinist does vibrato). Bow control either with an onscreen control, or by physically manipulating the device. Support for different bowing techniques.

Love it

I bought this at full price and I do not regret it one bit. One of the most expressive ways to play on the IPad. The sound is interesting and useful to use in recording. Could use some recording functions and copy/paste but still usable without it if you have a home studio. Also because you can save your own scale and sound presets it would be awesome in a live situation. It's on sale now so grab it and support the dev.

View in iTunes
This app is designed for both iPhone and iPad
  • $0.99
  • Category: Music
  • Updated:
  • Version: 1.1
  • Size: 0.4 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 4.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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