When assembling 07_testsnd.zsm, this error is raised:

Assembling 150 Version...
Assembling 150S Version...
/root/asm_file(32): Undefined symbol 'STATETAB0' Value=0
L011f:  lda     STATETAB0,X ; The state table get routine - WRIST_GETSTATE

The Toebes' assembler link to download includes the same tutorial programs, but they are a little different. Most of the changes are simply comment and indent differences, but I noticed this in the zip file that isn't in the code in the 7 - Playing with Sound tutorial:

-L011f:  lda     STATETAB0,X ; The state table get routine - WRIST_GETSTATE
-        rts
+L011f:          lda     TABLE0,X
+                rts

There is probably a bug in the version on the website, and this probably fixes said bug.

In addition, a ZAP file is still produced, but if it is synced to a 150, the watch resets its data and reboots when opening the program.