From 04d965d67a7264a1c7c211494aebda1953df7603 Mon Sep 17 00:00:00 2001
From: "info@mode42.com" <info@mode42.com>
Date: Fri, 7 Aug 2026 18:25:13 +0000
Subject: Initial push

---
 plugins/devices/audio-dummy/README.md | 41 +++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 plugins/devices/audio-dummy/README.md

(limited to 'plugins/devices/audio-dummy/README.md')

diff --git a/plugins/devices/audio-dummy/README.md b/plugins/devices/audio-dummy/README.md
new file mode 100644
index 0000000..4903d60
--- /dev/null
+++ b/plugins/devices/audio-dummy/README.md
@@ -0,0 +1,41 @@
+# Device: audio-dummy (acoustic bench)
+
+**Status:** `active` — development/test device for on-host acoustic signal evaluation.
+
+## Purpose
+
+Main **dummy device** for Bell 202 AFSK without RF:
+
+- **loopback** — full DSP encode/decode in process (CI default)
+- **alsa** — capture from sound card, sniff/decode live
+- **host** — TCP to `audio-dummyd` (M25 KISS host protocol, ports 8520/8521)
+
+## Tools
+
+```bash
+# Internal loopback (no hardware):
+stacks/crdop/tools/max25-signal-sniffer --loopback
+
+# ALSA capture sniff:
+stacks/crdop/tools/max25-signal-sniffer -D plughw:1,0 -t 3
+
+# Calibration tones (mark 1200 Hz / space 2200 Hz):
+stacks/crdop/tools/max25-signal-sniffer -D plughw:1,0 --mark -t 1
+stacks/crdop/tools/max25-signal-sniffer -D plughw:1,0 --space -t 1
+```
+
+## max25d
+
+```ini
+[devices]
+audio-dummy = audio:loopback
+
+[device.audio-dummy]
+mode = loopback   ; loopback | alsa | host
+; capture = plughw:1,0
+; playback = plughw:1,0
+; sample_rate = 48000
+; host_port = 8520
+```
+
+Docs: [docs/CRDOP.md](../../../docs/CRDOP.md)
-- 
cgit v1.3.1