Auto Bass AUv3 MIDI Generator 4+

Create bass lines

Cem Olcay

Designed for iPad

    • 4.2 • 10 Ratings
    • $5.99



Auto Bass is a MIDI generator app with an editable algorithm. You can create basslines or melodies automagically with Auto Bass. 

Set the algorithm parameters in your taste for generating the best basslines.
- Complexity breaks the longer notes into shorter notes.
- Density sets the note/rest ratio.
- Spread sets the range of the notes in the piano roll.
- Offset shifts the notes on the piano roll.
- Swing shifts the start position of the every other note in the sequence.
- Slide sets the percentage of the sliding notes in the sequence.

You can change the gate length and velocity of the notes globally with the gate and velocity parameters. 
Gate variety and velocity variety knobs introduce randomisation to the notes. 

The edit menu provides basic editing tools:
- Accent mode lets you add accented velocity to the tapped note on the piano roll.
- Slide mode lets you add slide to the tapped note on the piano roll.
- Move mode lets you drag the notes on the piano roll up and down to change their pitch.
- Transpose changes the key of the whole sequence.
- Nudge moves the whole sequence left or right.

You can set your bassline pattern's duration with between 1-bar long to 64-bars long.
Walk type rearranges the notes on the piano roll without regenerating the whole sequence.

With a MIDI keyboard or a MIDI sequencer, you can transpose your bassline. Also, there's an edit menu on the top right side of the app which you can add accents to your notes, transpose them or nudge them to left or right.

You can also export a MIDI file of your pattern and import it to your DAW for further editing or sharing.

The AUv3 plugin exposes all parameters as AU parameters, so you can modulate/automate them with a compatible AUv3 host app.
Auto Bass has a music theory engine with +100 scales, you can also use your custom ScaleBud 2 scales as well.
With BrainBud, you can change the key/scale of Auto Bass along with other compatible apps.

Auto Bass is a MIDI app and it does not produce any sound on its own. You need an audio/synth app in order to use it. For using the AUv3 plugin, you need an AUv3 host app such as AUM, Cubasis, Logic Pro, Nanostudio etc.

What’s New

Version 1.6

This version updates the scale picker.
- Adds new favorite section and lets you mark the favorite scales.
- The favorite scales will be universal between the Bud apps.
- Scale picker shows the current scale with a checkmark.
- Fixes the scale picker search bar's case sensitive search.
- Fixes the "rate app" link on the settings menu for iOS 17+.
- Adds scale picker button to the bottom toolbar

Ratings and Reviews

4.2 out of 5
10 Ratings

10 Ratings

Maik Deiman ,

Once again, one of the best developers!

Thank you so much for the latest update!!!

datdudenocap ,

Doesn’t work

Doesn’t show up in GarageBand or Logic Pro for iPad

Developer Response ,

Garageband doesn't support AUv3 MIDI FX apps but you can use the standalone app to work with Garageband. You can find it under the MIDI FX slot on Logic Pro. Please update your rating, thanks.

App Privacy

The developer, Cem Olcay, 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 Collected

The developer does not collect any data from this app.

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


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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ScaleBud - AUv3 MIDI Keyboard
ChordBud 2 AUv3 MIDI Sequencer
StepBud - AUv3 MIDI Sequencer
Patch Roulette AUv3 Randomizer
ArpBud 2 AUv3 MIDI Arpeggiator

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