Monorepo for Aesthetic.Computer
aesthetic.computer
native: default system_volume=200% on SOF, allow keys to reach 400%
granite-bary-branch confirmed audio works but too quiet — SOF cards
have no Master mixer (so system_volume defaulted to 100), and the
DSP pipeline reserves several dB of headroom. Default to 200% (4×)
for a normal listening level, and let volume-up reach 400% (16×)
for very quiet Chromebook speakers. soft_clip prevents harsh
distortion at high gain.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
+21
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+21
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fedac/native/src/audio.c
+21
-12
fedac/native/src/audio.c
···
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}
1479
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}
1480
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1481
-
// Apply system volume (software gain — hardware mixer may not attenuate)
1481
+
// Apply system volume (software gain). system_volume can go
1482
+
// above 100 on SOF cards where the DSP pipeline has -6dB+
1483
+
// headroom and the amp needs boosting to reach normal levels.
1484
+
// -1 means no Master mixer found — treat as 100% baseline.
1482
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{
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int sv = audio->system_volume;
1484
-
// -1 means no Master mixer found (SOF cards) — treat as 100%
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if (sv < 0) sv = 100;
1486
-
double vol = sv * 0.01; // 0-100 → 0.0-1.0
1487
-
// Use squared curve for more natural volume perception
1488
-
vol = vol * vol;
1488
+
double vol = sv * 0.01; // 0..4 (up to 400% → 16× linear)
1489
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vol = vol * vol; // squared curve
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mix_l *= vol;
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mix_r *= vol;
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}
···
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fprintf(stderr, "[audio] Cannot open mixer\n");
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}
2480
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2481
-
// Read initial system volume
2482
-
audio->system_volume = read_system_volume_card(card_idx);
2483
-
fprintf(stderr, "[audio] System volume: %d%%\n", audio->system_volume);
2482
+
// Read initial system volume. On SOF cards there's no Master mixer
2483
+
// and read_system_volume_card returns -1 — default to 200% so the
2484
+
// speaker amp (which has -6dB headroom in the DSP pipeline) has
2485
+
// enough gain to be audible at normal listening levels.
2486
+
int hw_vol = read_system_volume_card(card_idx);
2487
+
audio->system_volume = (hw_vol >= 0) ? hw_vol : 200;
2488
+
fprintf(stderr, "[audio] System volume: %d%% (hw=%d)\n",
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+
audio->system_volume, hw_vol);
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// HDMI audio disabled — opening HDMI PCM streams on the same HDA controller
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// can exhaust controller streams and cause EIO on capture.
···
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if (hw_vol >= 0) {
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audio->system_volume = hw_vol;
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} else {
3471
-
// No Master mixer — software gain mode
3477
+
// No Master mixer — software gain mode (0..400%).
3478
+
// 200% is the default boot volume on SOF cards; allow
3479
+
// keys to step up to 400 (16× linear) for quiet speakers.
3472
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int sv = audio->system_volume;
3473
-
if (sv < 0) sv = 100; // first call: default 100%
3474
-
if (delta > 0) sv = (sv + 5 > 100) ? 100 : sv + 5;
3475
-
else if (delta < 0) sv = (sv - 5 < 0) ? 0 : sv - 5;
3481
+
if (sv < 0) sv = 200;
3482
+
int step = 10;
3483
+
if (delta > 0) sv = (sv + step > 400) ? 400 : sv + step;
3484
+
else if (delta < 0) sv = (sv - step < 0) ? 0 : sv - step;
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audio->system_volume = sv;
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ac_log("[audio] Software volume: %d%%\n", sv);
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}