diff --git a/doc/from_scratch_monitor_speaker.md b/doc/from_scratch_monitor_speaker.md
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-# From Scratch: Monitor Speakers
-
-## Units
-
-- [Decibel](https://www.sfu.ca/sonic-studio-webdav/handbook/Decibel.html)
-- [SPL](https://sengpielaudio.com/calculator-soundlevel.htm)
-- [Sound Transmission](https://www.sekon.cc/acoustics/SoundTransmission/index.htm)
-- [Equal Loudness](https://cdn.standards.iteh.ai/samples/83117/6afa5bd94e0e4f32812c28c3b0a7b8ac/ISO-226-2023.pdf)
-
-## Software
-
-- [BassBox Pro](https://www.ht-audio.com/pages/Products.html#BBxL)
-
-## Amplifier
-
-### Class A
-
-- [Amp Camp Amp](https://diyaudiostore.com/pages/project-amp-camp-amp)
-
-### Crossover
-
-- [Lunch with Paul: everything you wanted to know about crossovers](https://www.youtube.com/watch?v=-9KU4kAFExg)
-
-## Driver
-
-### Tweeter
-
-- [Lunch with Paul: all about tweeters](https://www.youtube.com/watch?v=_AJgl_c0O7I)
-
-### Subwoofer
-
-- [Axiom Audio - Multiple Subwoofers with Ian Colquhoun](https://www.youtube.com/watch?v=ayOXz26qm3I)
-
-### Passive Radiator
-
-- [How to Design, build and Tune a Passive Radiator](https://www.youtube.com/watch?v=S_cTXISfQJQ)
-- [Lunch with Paul: Passive Radiators](https://www.youtube.com/watch?v=IUv6kp33E9A)
-- [Sealed vs Ported vs Passive Radiator - Why one over the other? - Sound Advice](https://www.youtube.com/watch?v=-gIN7QjRuGE)
-
-## Example
-
-3-way mainfield with subwoofer
-
-### Speaker
-
-- 3-way
-  - Dome tweeter
-  - Midrange
-  - 12/15 inch woofer sealed
-
-### Subwoofer
-
-- 12/15 inch woofer
-- 12/15 inch passive raditor
-
-### Crossover
-
-- Digital
-  - Mono input
-  - 4-way out
-
-### Amplifier
-
-- 4-way Class D
diff --git a/doc/from_scratch_music_studio.md b/doc/from_scratch_music_studio.md
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-# From Scratch: Music Studio
-
-## Location
-
-## Building
-
-## Sound Isolation
-
-## Acoustics
-
-## Human Requirements
-
-## Technical Requirements