docs: add more docs and todos

README.md

@@ -16,6 +16,24 @@ See `demos/project.edn` for the initial contents of the session.
 * Samples at ~/Lab/Music/pak
 * Odin2 LV2 ~/.lv2/Odin2.lv2
 
+## Overview
+
+Tek is inspired by "clip launching" workflows as exemplified by Ableton Live, Bitwig Studio,
+Ardour, and probably others. The main view consists of three sections:
+
+* The **arranger view** corresponds to Ableton's Session and Arrangement views.
+  It allows you to put together a musical composition as a sequence of **phrases**,
+  playing simultaneously across multiple **tracks**.
+* The **sequencer view** allows you to edit phrases, which consist of MIDI events.
+* The **chain view** allows you to add **devices** to each track. Devices determine
+  how a given phrase will sound. Currently, there are two devices implemented:
+  **sampler** and **plugin**.
+
+> [!NOTE]
+> Use `Tab` to switch focus between views. Use `Enter` to exclusively focus the highlighted view,
+> and `Esc` to unfocus it. When a view is focused, use the `Arrow Keys` and `Enter` to navigate.
+> Use `;` (semicolon) to open the command palette, which will list the remaining keybindings.
+
 ## TODO:
 
 * Control:
@@ -34,6 +52,8 @@ See `demos/project.edn` for the initial contents of the session.
   * [ ] Envelope
   * [ ] Stretch sample to BPM
   * [ ] Set BPM from sample
+  * [ ] Map MIDI note to sample
+  * [ ] Multisample
 * Sequencer/Arranger:
   * [x] Fix next/prev clip
   * [ ] Move clip/track/scene
@@ -47,11 +67,14 @@ See `demos/project.edn` for the initial contents of the session.
   * [ ] Open LV2 GUI
   * [ ] Pin favorite FX parameters with `*`
   * [ ] Parallel monitoring chain
+  * [ ] Support CLAP plugins
+  * [ ] Support VST2
+  * [ ] Support VST3
 * Transport:
   * [x] Focus transport to set BPM/sync/quant with `.,`
   * [ ] Double/halve BPM with `xX`
 * Rendering:
   * [ ] LineBuffer for scroll?
   * [ ] Buffered rendering with e.g. needs_update (only needed if the release build becomes slow)
-    * [ ] Buffered sequencer
+    * [x] Buffered sequencer
     * [ ] Buffered chain view