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The splash stops sounding before it ends, so listen earlier

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The check asked whether music was still playing four seconds in, and the
score it listens to ends its every voice on a rest - twelve ticks of
silence that hold the logo up while the voices decay. So it was measuring
exactly the quiet the score asks for and calling a perfect tune a failure.

Three seconds instead, which is still twice the second and a half the
silent path holds the logo for, and which is what the check is actually
about: that this is the tune and not the hold.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW
This commit is contained in:
Anachronaut
2026-09-06 13:22:56 -04:00
co-authored by Claude Opus 5
parent f351ee8844
commit 4e61158b11
1 changed files with 11 additions and 6 deletions
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Tests/sound.sh
+11 -6
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@@ -940,9 +940,14 @@ open('$BUILD/still.pad','wb').write(b'\x00' * 20000)"
--disk "$ROOT/Tests/build/disks/cosmos.img" --ram-disk 2048 \
"$BUILD/cosmos.bin" > "$BUILD/splash.out" 2>&1 || true
# The tune is six seconds of ticks. What is checked is that music is still playing well
# after a splash that failed to load would have given up: the silent path holds the logo
# for ninety frames, a second and a half, and then the game starts.
# What is checked is that music is still playing well after a splash that failed to load
# would have given up: the silent path holds the logo for ninety frames, a second and a
# half, and then the game starts. So the late window is at three seconds, twice that.
#
# NOT LATER, because the tune stops sounding before it ends. Its last sequence on every
# voice is a rest, which is what holds the logo up while the voices decay - so a window
# past three and three quarter seconds is measuring the silence the score asks for and
# would fail on a tune that played perfectly.
read -r EARLY LATE <<EOT
$(python3 - "$BUILD/splash.raw" <<'PY2'
import struct, sys
@@ -955,13 +960,13 @@ v = struct.unpack("<%dh" % n, d)
def rms(a, b):
w = v[a:b]
return int((sum(x*x for x in w) / len(w)) ** 0.5) if w else 0
print("%d %d" % (rms(48000, 96000), rms(192000, 240000)))
print("%d %d" % (rms(48000, 96000), rms(144000, 168000)))
PY2
)
EOT
[ "${EARLY:-0}" -gt 500 ] && [ "${LATE:-0}" -gt 500 ] \
&& result ok "a game plays its own music" "still sounding at four seconds, so it is the tune and not the silent hold" \
|| result no "a game plays its own music" "RMS was $EARLY at one second and $LATE at four"
&& result ok "a game plays its own music" "still sounding at three seconds, so it is the tune and not the silent hold" \
|| result no "a game plays its own music" "RMS was $EARLY at one second and $LATE at three"
fi
echo