diff --git a/README.md b/README.md
index 9b50bfa..526eb29 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1,25 @@
 # ChromaTracker
 
-ChromaTracker is an (unfinshed) web-based [MOD](https://en.wikipedia.org/wiki/MOD_(file_format)) tracker, designed especially for phones and tablets.
+ChromaTracker is an (unfinshed) web-based [MOD](https://en.wikipedia.org/wiki/MOD_(file_format)) music [tracker](https://en.wikipedia.org/wiki/Music_tracker), designed especially for phones and tablets.
 
 The design is primarily inspired by Alexander Zolotov's apps [SunVox](https://www.warmplace.ru/soft/sunvox/) and [PixiTracker](https://www.warmplace.ru/soft/pixitracker/), as well as [MilkyTracker](https://milkytracker.org/) and others.
 
 <span><img src="docs/screenshot1.png" width="135"> <img src="docs/screenshot2.png" width="135"> <img src="docs/screenshot3.png" width="135"></span>
 
-Currently implemented:
+Features:
 
+- Supports mobile browsers and PWA installation
+  - Interface fits comfortably on a phone screen in portrait orientation
 - Custom MOD playback engine using Web Audio
   - Supports MOD extensions like extra channels, panning effects, and expanded frequency limits
-- Pattern editor with touch keyboard, built-in effect documentation
+  - Supports almost all effects (only `E0x` and `EFx` are not supported)
+- Pattern editor with touch keyboard, built-in effect documentation, cut/copy/paste
 - Sample editor with basic audio effects, 8-bit dithering, recording
 - Bird's-eye sequence overview (inspired by Renoise's Pattern Matrix)
 - Full undo support
+- Persistent local file storage, import/export MOD/sample files
 - Render to WAV
 - A/V sync accounting for high-latency connections (e.g. Bluetooth)
-- Persistent local file storage
-- Supports mobile browsers and PWA installation
 
 You can try the current alpha build at [tracker.chroma.zone](https://tracker.chroma.zone/). On mobile devices it works best when it's installed as a [PWA](https://www.installpwa.com/from/tracker.chroma.zone).
 
diff --git a/src/Playback.js b/src/Playback.js
index 650b1d5..a3fbc70 100644
--- a/src/Playback.js
+++ b/src/Playback.js
@@ -898,7 +898,6 @@ export function getSamplePredictedPos(channel, time) {
     let timeDiff = time - channel.samplePredictTime
     if (timeDiff < 0) { return channel.samplePredictPos }
     let rate = periodToRate(channel.scheduledPeriod)
-    // TODO: use detune (arpeggios)
     let pos = Math.floor(channel.samplePredictPos + rate * baseRate * timeDiff)
     let {loopStart, loopEnd} = channel.sourceSample
     if (Sample.hasLoop(channel.sourceSample) && pos >= loopEnd) {
diff --git a/src/file/Mod.js b/src/file/Mod.js
index 27d981c..e458f93 100644
--- a/src/file/Mod.js
+++ b/src/file/Mod.js
@@ -47,7 +47,6 @@ export function read(buf) {
     /** @type {number} */
     let numChannels = mod.defaultChannels
     let initials = asciiDecode.decode(new DataView(buf, 1080, 4))
-    // TODO: support old 15-sample formats?
     let chanStr = initials.replace(/\D/g, '') // remove non-digits
     if (initials == 'OCTA' || initials == 'OKTA' || initials == 'CD81') {
         numChannels = 8
diff --git a/src/ui/WaveEdit.js b/src/ui/WaveEdit.js
index 4b3753e..37a3d3a 100644
--- a/src/ui/WaveEdit.js
+++ b/src/ui/WaveEdit.js
@@ -179,7 +179,6 @@ export class WaveEdit {
         }
 
         if (sample.wave != this.viewSample?.wave) {
-            // TODO: async and only when visible!
             this.createSamplePreview(sample.wave)
         }