From 46c88236f60cbe045cdba0eb399c5e4b442a859e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=27=C3=A9lectron=20rare?=
 <108685187+electron-rare@users.noreply.github.com>
Date: Sun, 28 Jun 2026 19:03:38 +0200
Subject: [PATCH] feat: matrix-only boot via MATRIX_ONLY env

---
 sound_algo/data_only/boot.scd | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/sound_algo/data_only/boot.scd b/sound_algo/data_only/boot.scd
index 4ff11d9..0968ff0 100644
--- a/sound_algo/data_only/boot.scd
+++ b/sound_algo/data_only/boot.scd
@@ -205,11 +205,17 @@ Routine({
     (~base ++ "matrix.scd").load; s.sync;
 
     // -- 7) Demarre la scene par defaut -----
+    // MATRIX_ONLY env disables the concert/body-play scene so only the
+    // matrix arranger produces sound (load a preset + /matrix/play).
     if(~doScene.isNil) {
         "[data-only/boot] ERREUR : ~doScene non defini".warn;
     } {
-        "[data-only/boot] starting scene \\play (body-play)".postln;
-        ~doScene.(\play);
+        if("MATRIX_ONLY".getenv.notNil) {
+            "[data-only/boot] MATRIX_ONLY: concert disabled, matrix only".postln;
+        } {
+            "[data-only/boot] starting scene \\play (body-play)".postln;
+            ~doScene.(\play);
+        };
     };
 
     "".postln;