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P2-R1: ALSA + JACK2 low-latency config (scripts, quirks, tuning) P2-R2: Carla integration (build scripts, 8ch rack config, NAM LV2 support) P2-R3: Plugin manager, categories, blacklist, NAM model support P3-R1: Mixer DSP engine (channel strip, routing matrix, bus mgr, automation) P4-R1: MIDI engine (learn mode, clock sync, HID discovery, mapping store) P4-R2: Network API (OSC server, FastAPI REST, WebSocket, auth, rate limiter) P5-R1: Touchscreen UI evaluation + main entry point docs: Audio stack, Carla integration, MIDI support, UI evaluation tests: Full test suite (292 passing)
91 lines
3.9 KiB
Bash
Executable File
91 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# audio-stack-start — initialize the full low-latency audio environment
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# Run with: sudo audio-stack-start
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# Then JACK runs as the 'pi' user (or current user if not root)
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set -e
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echo ""
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echo "╔══════════════════════════════════════════╗"
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echo "║ Audio Stack Initialization ║"
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echo "╚══════════════════════════════════════════╝"
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echo ""
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# ── 1. CPU Governor ──────────────────────────────────
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echo "1/6 Setting CPU governor → performance..."
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for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do
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if [ -f "$cpu" ]; then
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echo performance > "$cpu" 2>/dev/null || true
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fi
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done
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echo " Done."
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# ── 2. IRQ Priorities ────────────────────────────────
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echo "2/6 Configuring IRQ priorities..."
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if command -v rtirq > /dev/null 2>&1; then
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if systemctl is-active --quiet rtirq 2>/dev/null; then
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systemctl restart rtirq 2>/dev/null || true
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else
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systemctl start rtirq 2>/dev/null || true
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fi
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echo " rtirq started."
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else
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echo " rtirq not installed. Run: sudo apt install rtirq-init"
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fi
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# ── 3. PAM Limits Check ──────────────────────────────
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echo "3/6 Checking PAM limits..."
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CURRENT_RTPRIO=$(ulimit -r 2>/dev/null || echo "unknown")
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CURRENT_MEMLOCK=$(ulimit -l 2>/dev/null || echo "unknown")
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echo " rtprio: $CURRENT_RTPRIO (need 99)"
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echo " memlock: $CURRENT_MEMLOCK (need unlimited)"
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# ── 4. USB Audio Driver ──────────────────────────────
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echo "4/6 Configuring USB audio driver..."
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if lsmod 2>/dev/null | grep -q snd_usb_audio; then
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modprobe -r snd-usb-audio 2>/dev/null || true
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sleep 1
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fi
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modprobe snd-usb-audio nrpacks=1 2>/dev/null || true
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echo " snd-usb-audio loaded with nrpacks=1"
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# ── 5. USB Audio Detection ───────────────────────────
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echo "5/6 Checking USB audio device..."
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sleep 1
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if aplay -l 2>/dev/null | grep -qi usb; then
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echo " USB audio interface detected:"
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aplay -l 2>/dev/null | grep -i usb | head -3 | sed 's/^/ /'
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else
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echo " WARNING: No USB audio interface found!"
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echo " Check: lsusb | grep -i audio"
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fi
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# ── 6. Start JACK ────────────────────────────────────
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echo "6/6 Starting JACK2..."
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if pgrep -x jackd > /dev/null; then
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echo " JACK is already running. PID: $(pgrep -x jackd)"
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else
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if [ "$EUID" -eq 0 ] && id pi >/dev/null 2>&1; then
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# Running as root, drop to pi user
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sudo -u pi jackd -P70 -t2000 -d alsa -d hw:USB -r48000 -p128 -n3 -S > /tmp/jackd.log 2>&1 &
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echo " JACK launched as user 'pi' (PID: $!)"
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else
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jackd -P70 -t2000 -d alsa -d hw:USB -r48000 -p128 -n3 -S > /tmp/jackd.log 2>&1 &
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echo " JACK launched (PID: $!)"
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fi
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sleep 2
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fi
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# ── Final status ─────────────────────────────────────
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echo ""
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echo "╔══════════════════════════════════════════╗"
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echo "║ Audio Stack Ready ║"
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echo "╚══════════════════════════════════════════╝"
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echo ""
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echo " Check ports: jack_lsp -c system"
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echo " Test latency: jack_delay -O system:playback_1 -I system:capture_1"
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echo " Auto-route: jack-route-default"
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echo " Stop stack: audio-stack-stop"
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echo " Xrun monitor: jack_cpu_load"
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echo ""
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