From 8bfdcda5ced9e5427181979cda833399e7436cdf Mon Sep 17 00:00:00 2001
From: erikkaashoek <erik@kaashoek.com>
Date: Mon, 2 Nov 2026 18:36:32 +0100
Subject: [PATCH] Config: clear the 1 kHz tone option read from an old
 sd_icon_save byte

---
 flash.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/flash.c b/flash.c
index 6ab9981..2a3e289 100644
--- a/flash.c
+++ b/flash.c
@@ -127,6 +127,10 @@ config_recall(void)
   if (config.sd_icon_save == 0)
     config.sd_icon_save = SDIS_DEFAULT;
 #endif // __USE_SD_CARD__
+#ifdef TINYSA4
+  if (config.wfm_1khz_harmonic > 100)   // v1.4-220 placed it on the old sd_icon_save byte (always >= 0x80)
+    config.wfm_1khz_harmonic = 0;
+#endif
 
   return 0;
 }