diff --git a/doc/6-sample/README.md b/doc/6-sample/README.md
index 05891a49a..2f4fe3cd4 100644
--- a/doc/6-sample/README.md
+++ b/doc/6-sample/README.md
@@ -1,6 +1,6 @@
 # samples
 
-In the context of Furnace, a sound sample (usually just referred to as a sample) is a string of numbers that hold sampled PCM audio.
+In the context of Furnace, a sound sample (usually just referred to as a sample) is a string of numbers that represent sampled PCM audio.
 
 In Furnace, these samples can be generated by importing a .wav (think of it as an higher quality MP3) file.
 
@@ -13,6 +13,7 @@ as of Furnace 0.6, the following sound chips have sample support:
 - PC Engine/TurboGrafx-16/HuC6280
 - Amiga/Paula
 - SegaPCM
+- NEC PC-9801/YM2608 (ADPCM channel only)
 - Neo Geo/Neo Geo CD/YM2610 (ADPCM channels only)
 - Seta/Allumer X1-010
 - Atari Lynx
@@ -21,12 +22,16 @@ as of Furnace 0.6, the following sound chips have sample support:
 - QSound
 - ZX Spectrum 48k (1-bit)
 - RF5C68
-- WonderSwan
+- SNES/S-DSP
+- WonderSwan (second channel only)
 - tildearrow Sound Unit
 - VERA (last channel only)
 - Y8950 (last channel only)
 - Konami K007232
-- a few more that I've forgotten to mention
+- Irem GA20
+- Ensoniq OTTO/ES5506
+- Yamaha PCMD8/YMZ280B
+- MMC5 (last channel only)
 
 ## compatible sample mode
 
@@ -45,9 +50,9 @@ due to limitations in some of those sound chips, some restrictions exist:
 - NES: if on DPCM mode, only a limited selection of frequencies is available, and loop position isn't supported (only entire sample).
 - SegaPCM: your sample can't be longer than 65535, and the maximum frequency is 31.25KHz.
 - QSound: your sample can't be longer than 65535, and the loop length shall not be greater than 32767.
-- Neo Geo (ADPCM-A): no looping supported. your samples will play at ~18.5KHz.
-- Neo Geo (ADPCM-B): no loop position supported (only entire sample), and the maximum frequency is ~55KHz.
-- YM2608: the maximum frequency is ~55KHz.
+- Neo Geo (ADPCM-A): no looping supported. your samples will play at 18.518KHz.
+- Neo Geo (ADPCM-B): no loop position supported (only entire sample), and the maximum frequency is 55.555KHz.
+- YM2608: the maximum frequency is 55.555KHz.
 - MSM6258/MSM6295: no arbitrary frequency.
 - ZX Spectrum Beeper: your sample can't be longer than 2048, and it always plays at ~55KHz.
 - Seta/Allumer X1-010: frequency resolution is terrible in the lower end. your sample can't be longer than 131072.