As you are aware, a speaker will have different amplitude responses to different frequencies and the Organelle M speaker is no different. Some distortion may happen depending on the frequency and volume of a given patch setting. If this happens, the best thing to do is turn the volume down. If you need a louder signal, the 1/4" output jack can be used with a studio monitor, amp, etc.
A simple sine wave oscillator running on a desktop/laptop computer may cause the same distortion. We tried the following patch on five different desktop and laptop computers that had built-in speakers:
…and at nearly full or full speaker volume, distortion could be heard on three of the computers we tried. This is the nature of amplified sound.