Mini: Audio glitches while recording via Line-in

First please read How to report bugs

  • when filling this template, remove all text in Italic including this paragraph
  • submit the bug report by fully completing the template below

Bug Description

describe the issue you encountered and what is the correct behavior which you expect

Reproduction Steps

  1. write down minimum number of exact steps which reproduce the issue


bug is reproducible always / sometimes / happened once

Found in

go to Config > Firmware page on your device and copy version / build numbers below

  • Version: [example 1.8.0]
  • Build: [example 345]


simply drag and drop to upload or paste links to:
photos, short videos, and project folder (.zip format only)

Every recording from the line-input has glitches in them.

I try many configurations, cables…

Really boring, original sd card…


This product is not (yet) reliable…

(it’s also a mess to connect an iphone in midi…)

The most interesting functions are unusable, which is sad…
It’s going to end up in a drawer…

The two functions I bought this tracker for don’t work, and it’s also impossible to record rhythms on the fly directly with the tracker… I regret my purchase

Hi @julienchrist , please read How to report bugs Thank you :slight_smile:

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Let me try to fill up this template since I just had the same problem with my new Tracker Mini. Needless to say, this is a frustrating bug - I was looking forward to record a bunch of my presets as samples to the mini and it seems like I will have to do find a workaround for now.

Thanks for having a look! I would love to see this fixed soon. :slightly_smiling_face:

Bug Description

When recording via line in on the tracker mini, the audio records with glitches. These glitches seem to appear whenever the screen updates during the recording.

The correct behavior would be the absence of glitches.

Reproduction Steps

  1. plug in a working audio cable into a working audio source
  2. plug audio cable into line input on the tracker mini
  3. enter the sample recorder page
  4. select line in as source
  5. hit recording
  6. play something on the audio source
  7. stop recording
  8. preview recording


bug is reproducible always

I tested this with 3 different synths and audio cables. I also tested different volumes to make sure this is not audio clipping due to a very hot audio signal.

I did not experience the issue when recording with the microphone.

Found in

  • Version: 1.0.0
  • Build: 492


As a new user it seems I cannot upload attachments yet, but happy to supply some glitchy samples later.
[EDIT: here are two samples recorded on the mini.]
glitchy (1.8 MB)

Hi @jakobg and @julienchrist. Thank you both for reporting this bug. We are sorry you’re experiencing issues while using our product. We will do our best to resolve it and notify you when it’s ready

1 Like

I’m experiencing this bug too when the screen brightness is set to ‘high’. As @jakobg identified, it appears to be when the screen updates with the new recorded waveform.

@julienchrist see if changing to screen brightness to ‘medium’ or ‘low’ fixes your issue.

One potential fix for this in future firmware could be to automatically dim the screen when recording, maybe?

I’m having the same issue on my Mini. Not always, but often. Screen brightness doesn’t seem to matter.