bismark bs-16i is a 16 multi-timbral playback sampler. It loads SoundFont and DLS (Downloadable Sounds) as WaveTable, and can be used for keyboard instrument, MIDI sound module, and MIDI player.

bs-16i has the synthesizer engine that has been adopted for many professional/commercial types of equipment. Using SoundFont / DLS libraries, you can play with your great number of instruments. With Hi-Res Engine option prepared as In-App purchase option enables high-quality and low-noise audio outputs by 100% floating-point calculations.

All standard MIDI messages are supported, and your iPhone and iPad can be used as a GM (General MIDI) sound module by using pre-installed GeneralUser GS SoftSynth v1.44.sf2 (S. Christian Collins).

As a keyboard instrument, you can play with the scalable screen keyboard, pitch bend wheel, and many control change controllers.

Internal MIDI player supports SMF (Standard MIDI File) format as Song.

WaveTable / Song / Scene files are managed in the "bs-16i" folder of your iCloud Drive, and synced between all your iOS / iPadOS devices.

Moreover, this application supports Core MIDI interfaces like IK Multimedia iRig KEYS / iRig MIDI, YAMAHA iMX-1, LINE6 MIDI Mobilizer 2, Apple Lightning -USB Camera Adapter with USB Generic MIDI Interface, and Bluetooth accessory (Miselu C.24, QUICCO SOUND mi.1, etc). With them, you can communicate with other external MIDI hardware like a synthesizer, sequencer. Also, bs-16i can be a background and drove from other apps using Virtual MIDI.

Audiobus 3, and Inter-App Audio is supported. You can send bs-16i's output stream to other apps.

AUv3 (AudioUnit v3) extension is included. You can use bs-16i in GarageBand, BeatMaker3, AUM as a plug-in instrument.

- To load the specified SoundFont / DLS file, the device has to ready free memory larger that file size of it.
- This application collects the following information: Device name, OS version, User Location, SoundFont / DLS file name, CoreMIDi I/F name.

What’s New

Version 4.2.2

・Fix that Scenes for AUv3 were not migrated on starting to use iCloud drive.

・CAUTION: Changed the identifier of bs-16i AUv3 from version 4.2. The settings of this AUv3 will not be taken over automatically and migration should be required. Please refer for details.

Ratings and Reviews

3.8 out of 5
71 Ratings

71 Ratings

Lesndes ,

Love this app

I’ve used this app for a number of years but just came across this bug. After adding portamento to a patch I tried (multiple times) to save it as a scene. After it “saves” the portamento setting is at 0. I’ve tried saving it as a new scene, overwriting an old scene, changing the sound font, and everything else I could think of but nothing saves the portamento setting. This is not the on/off setting (that gets saved) but the amount of portamento. Why is this?

GtrGeorgeDC ,


Especially with the latest update!

I have been using bs-16i for a long time, and it works beautifully. It is very easy to import any sf2 file, either purchased ones such as Sound Factory files, or those you can make yourself with something like Polyphone.
The biggest negative I had was that bs-16i would not save the sound font setting with patch info in a host app, such as AUM; this required you to manually load the correct sound font, or make up a custom sound font that contains all the sounds you’d like to have on hand. With the latest update, this limitation is gone, and bs-16i is working like I have wanted it to all along.
BIG THANKS to the developer for getting this feature working!

Developer Response ,


GadgetMojo ,

Must have app!

As you probably know the purpose of this app, I’ll just say that it does it very well. Extremely efficient app, was running several instances in AU mode without any issues. And I was using huge samples (1gb+) in all of them. Excellent developer!

One small request, if you could make the defaults, when starting a new instance, with all fx - Off, and volume at middle position, this app would simply be perfect! I always use various external fx, and the volume is a bit too loud by default. Thanks!

App Privacy

The developer, bismark LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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