Developer Erik Sigth has introduced Strng – a iOS string synthesiser, inspired by the Karplus-Strong algorithm.
In Karplus-Strong synthesis, an exciter impulse – like a burst of noise – is looped through a filtered delay line. This model can be used to simulate the way sounds resonate within some types of instruments.
With Strng, physical modeling starts with a short burst of noise that is then guided by a tuned delay buffer and string tension filter, generating plucked string-like sounds. No samples are used.
Strng is 16-voice polyphonic and can be controlled with an in-app 25 key chromatic keyboard. You can also connect a MIDI controller through USB or W\iFi.
To further shape the sound, two post-effects are available, a ping-pong stereo delay and two channel resonant filter, controlled by two LFOs.
- String synthesis engine
- 16 voice poliphony
- Core MIDI
- 25 multitouch keyboard
- Gain control
- Tune, Detune control
- ADSR Attack/Decay/Sustain/Release
- Noise (length, sample crush)
- Noise pre filter
- String tension
- Stereo ping-pong delay
- Two channel resonant low pass filter LFOs
strng is available now for $1.99 in the App Store.