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By alexander smith

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SIDPAD is a flexible 8bit style synthesizer offering many features:
-3 Voice Synthesizer
Over 40 controllable parameters to create a wide range of 8 bit chip-tune sounds. All knobs midi controllable!

-Multimode Filter
includes Type, Cutoff, Resonance and customizable Cutoff Envelope

-Flexible Modulation
Hand draw up to 4 graphs and assign them to the synth's parameters to add movement and expression to your sound

-Wavetable Editor
The 16 step wavetable editor is a great tool to set up sound effects and arpeggiated melodies.
You can sequence notes and waveform changes either as one shot or in a loop and vary the speed

-Help Mode
Every feature is explained via the help button to get you up and running with SidPad regardless of your synthesizer experience :)

-AUDIOBUS Support!

I made this app for you! If problems, please contact me prior to leaving reviews, I'm happy to help with those and would also be delighted to implement new features for you!

Thanks for using SidPad!

Recent Review (synthUniverse):

SIDPAD is inspired by the 6581/8580 SID chips that were used to generate sound in the Commodore 64. SIDPAD has 50 preset sounds that sound similar to the kind of sounds used in the Commodore 64 and 50 user presets to store your own sounds. For the presets a lot of the sounds are instantly recognizable. Mozart Sid, Classic arp1, arp2 are sure to bring back memories for those people who used the Commodore 64 way back in the early 80s.
The VOICE page has several interesting feauture to create your own sounds. Being 3 voice you can mix and match 4 waveforms: Square, Saw, Triangle and Noise together. Each waveform has several settings to change, such as its Pulse Width, Portamento, Transpose and Fine Tune. For effects you have Hard Sync and Ring Modulation. The VCA section has the usual Attack, Decay, Sustain and Release rates to adjust.

The FILTER page has several settings that will affect the tone of the sound. You can use the filter to affect 1 voice or 3 voices at once. The filtertypes include LP, HP and BP, including the option to turn it off altogether. The actual filter settings include an ENV Amount, Cutoff and Resonance. There is also a ENV section to change Attack, Decay, Sustain and Release.

The MOD page gives you several options to assign various parameters to create movement. You can draw up to 4 graphs and assign Depth and Speed to each one. You can then Loop the sound, Retrig and copy and paste within the 4 graphs. The assignable values for the depth are Pitch 1, 2, 3, Pulsewidth 1, 2, 3, Filter cutoff and Off. The same for the Speed of the Modulation.

The WAVETABLE page has to be enabled to turn it on, unlike the other sections which activate when you go to the screen. It is a 16 step wavetable editor useful
to create effects and arpeggiated melodies. There is a loop to keep the sound going and a speed dial.

The CONFIG page has information for what version of SIDPAD you have, A MIDI mapping button and Record button to export performance to .WAV.

This is a great little app. Very flexible and intuitive. The design is simple and well laid out. Get it free to see how easy it is to create cool retro sounds or buy the PRO version to delve deeper in it. Whatever you decide it wont disappoint.

What's New in Version 2.2

IOS8 and Audiobus2 support

iPad Screenshots

iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

Sounds good, when it works.

I'm sure plenty of hard work went into this app, as there are many things to like about it, the sound being one of those things. Unfortunately, without going in depth on anything, I'll comment on the most important issue... this app crashes or, even more often, fails to load. I've got an iPad Air with the latest iOS. I've tried rebooting, and deleting-reinstalling this app. I've owned it for a month and gotten to use it for about 10 minutes. I went to the developers website, and it appears that they make custom sid based synths which sound pretty good on their promo videos and are reasonably priced. For a second I even considered getting one. Then I remembered the app. I just hope the hardware synths they sell on their website are more reliable than the app. If so, then they're a bargain. If their reliability is in any way similar to what I've experienced with the sidpad app, they're a waste of money. Once sidpad stops crashing, my app review will probably jump to at least 4 stars, maybe 5 if they get audiobus working solid, based on the 10 minutes of sound I heard from it. If it runs really well, I may even consider one of their hardware synths.


I'm having the same issue with the app crashing and/or failing to load. This is unfortunate as SIDPAD is one of the more unique and useful apps, however, not surprising since Twisted Electrons has always been inconsistent with quality. Never at any point have all of their apps worked properly. After the latest round of updates Studio 1111 does not crash anymore when selecting drum kits but Bleep no longer works with Audiobus. It is highly recommended to anyone considering purchasing apps from these developers just save your money and spare yourself the potential frustration.

8bit monster

Soooo much fun! quirky 8bit and now it works on iOS 9..Peace christo

View In iTunes
  • $3.99
  • Category: Music
  • Updated:
  • Version: 2.2
  • Size: 8.8 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.0 or later. Compatible with iPad.

Customer Ratings

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Top In-App Purchases

  1. SidPad Pro Mode$3.99