Make default grain settings less extreme

This changes the default variation and spread to smaller values

Changelog: changed

daisyy-looper/looper.h

@@ -167,8 +167,8 @@ class Looper {
     float loop_start_f = 0.0f;
     float loop_length_f = 1.0f;
     uint8_t playhead_count = 8;
-    float grain_spread = 2.0f;
-    float grain_variation = 0.0f;
+    float grain_spread = 0.01f;
+    float grain_variation = 0.01f;
     float volume = 1.0f;
     bool fresh = true;
     RecPitchMode rec_pitch_mode = REC_PITCH_MODE_NORMAL;