I’m investigating buying a Tracker+ and would like to make ambient music with nature-based field records. I’m wondering if it’s possible to EQ and unmelodic sample into a pad as in this video: https://youtu.be/nbEeaV0TgTI?si=CnjJgygJa1jT0bCE
Thank you!
The short answer is Yes, you can do this but more in the simplistic example shown at the start of the video. You can indeed Use a resonant bandpass filter on your sample of noise to focus in on the frequency you’re looking for. But further into the video he’s using a plugin that creates multiple bandpass/notched filters that are spaces by octaves, or rather by multiplying or diving the frequency. If you want to go that route, your best to prepare you samples in a DAW with a plugin that does that, and then import those samples into the Tracker.
Is there a chart somewhere showing how the Tracker’s filter cutoff maps to actual frequencies/notes?
That would be less of a Tracker thing and more universal as to how Freq relate to notes. Here is a really nice chart that maps notes, frequency and MIDI notes 
https://homes.luddy.indiana.edu/donbyrd/Teach/MusicalPitchesTable.htm
Nah, I’m talking about mapping Tracker’s cutoff parameter to frequency.
Like, what frequency is 29%?
I sure know there are hundreds frequency-to-note charts on the Internet. But thanks for the link.
Thank you, that’s very helpful. I spend so much time on a computer I’m really trying to go DAW-less, but it looks like I’ll need something to pull melody out of field recordings. The gent in the video was using Bitwig, but is that functionality common in most DAWs?
Nowadays i’d be surprised to find a DAW that doesn’t have an EQ Plugin integrated by default.
In case you’re unfamiliar with KVR, it’s an amazing source for free VST plugins
While we are at recommending free things → Surge XT
Allows routing audio in for processing and also has a eq section (and much more)
You could also always take a sample into VCV Rack and process the hell out of it there. Lots of things that can be discovered that way as well.