From c6004d4c1fb111f2938ec8e54f9b1f99c70b9932 Mon Sep 17 00:00:00 2001
From: Maxim Raznatovski <nda.mr43@gmail.com>
Date: Thu, 30 Jan 2025 15:17:56 +0100
Subject: [PATCH] Feat: Add support for PEQ preamp (#1923)

---
 music_assistant/helpers/dsp.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/music_assistant/helpers/dsp.py b/music_assistant/helpers/dsp.py
index 457825f1..5195bd64 100644
--- a/music_assistant/helpers/dsp.py
+++ b/music_assistant/helpers/dsp.py
@@ -24,8 +24,11 @@ def filter_to_ffmpeg_params(dsp_filter: DSPFilter, input_format: AudioFormat) ->
         List of FFmpeg filter parameter strings
     """
     filter_params = []
+    preamp = 0
 
     if isinstance(dsp_filter, ParametricEQFilter):
+        if dsp_filter.preamp:
+            preamp = dsp_filter.preamp
         for b in dsp_filter.bands:
             if not b.enabled:
                 continue
@@ -109,4 +112,7 @@ def filter_to_ffmpeg_params(dsp_filter: DSPFilter, input_format: AudioFormat) ->
                 f"equalizer=frequency=9000:width=18000:width_type=h:gain={dsp_filter.treble_level}"
             )
 
+    if preamp != 0:
+        filter_params.insert(0, f"volume={preamp}dB")
+
     return filter_params
-- 
2.34.1