diff --git a/ch32v-insert-coin/bins.zip b/ch32v-insert-coin/bins.zip
deleted file mode 100644
index b77a194..0000000
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diff --git a/ch32v-insert-coin/bins/README.md b/ch32v-insert-coin/bins/README.md
deleted file mode 100644
index c548cd9..0000000
--- a/ch32v-insert-coin/bins/README.md
+++ /dev/null
@@ -1,4 +0,0 @@
-TO FLASH / RUN:
-
-`wlink -v flash --enable-sdi-print --watch-serial bins/coin_sound_8ksps.bin`
-
diff --git a/ch32v-insert-coin/bins/coin_sound_16ksps.bin b/ch32v-insert-coin/bins/coin_sound_16ksps.bin
deleted file mode 100755
index c003c2a..0000000
Binary files a/ch32v-insert-coin/bins/coin_sound_16ksps.bin and /dev/null differ
diff --git a/ch32v-insert-coin/bins/coin_sound_6ksps.bin b/ch32v-insert-coin/bins/coin_sound_6ksps.bin
deleted file mode 100755
index 9796caf..0000000
Binary files a/ch32v-insert-coin/bins/coin_sound_6ksps.bin and /dev/null differ
diff --git a/ch32v-insert-coin/bins/coin_sound_8ksps.bin b/ch32v-insert-coin/bins/coin_sound_8ksps.bin
deleted file mode 100755
index 6cafcc9..0000000
Binary files a/ch32v-insert-coin/bins/coin_sound_8ksps.bin and /dev/null differ
diff --git a/ch32v-insert-coin/ext/adpcm-pwm-dac b/ch32v-insert-coin/ext/adpcm-pwm-dac
index ba25b7c..99ce71e 160000
--- a/ch32v-insert-coin/ext/adpcm-pwm-dac
+++ b/ch32v-insert-coin/ext/adpcm-pwm-dac
@@ -1 +1 @@
-Subproject commit ba25b7c89f4deb52426d97fd35eb13496f183775
+Subproject commit 99ce71e8d03e382b51732db7d0771349c51c7f48
diff --git a/ch32v-insert-coin/ext/wavetable-synth b/ch32v-insert-coin/ext/wavetable-synth
index e6ca9c7..30033e1 160000
--- a/ch32v-insert-coin/ext/wavetable-synth
+++ b/ch32v-insert-coin/ext/wavetable-synth
@@ -1 +1 @@
-Subproject commit e6ca9c7ed8b9af193333be793983df5e48cb961a
+Subproject commit 30033e1438c25aed4ea506cdbd69cc4ceffa0b4e