From 6913736476111e2880d9c05da084c85c1a9c6c35 Mon Sep 17 00:00:00 2001
From: Blitblank <pmcgeee03@gmail.com>
Date: Wed, 24 Jun 2026 20:52:16 -0500
Subject: [PATCH] linux + piano keyboard support

---
 CMakeLists.txt                        | 9 +++++++--
 src/LoggerService.cpp                 | 1 +
 src/synth/Instruments/PianoString.cpp | 2 +-
 src/synth/Instruments/PianoString.hpp | 2 +-
 src/synth/MidiController.cpp          | 4 ++++
 5 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 93423d3..afaa0a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,10 @@
 
-cmake_minimum_required(VERSION 4.0)
+cmake_minimum_required(VERSION 3.21)
 project(sonobulus LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++20")
 
 # get dependencies
 include(FetchContent)
@@ -59,12 +60,13 @@ add_library(sonobulus_core STATIC
     src/synth/Instrument.cpp
     src/synth/Instruments/PianoString.cpp
 )
+
 target_link_libraries(sonobulus_core PRIVATE
     Qt6::Core
     Qt6::Quick
     rtaudio
     rtmidi
-    libconfig++
+    config++
 )
 
 target_include_directories(sonobulus_core PRIVATE 
@@ -82,6 +84,8 @@ qt_add_executable(sonobulus
     src/main.cpp
 )
 
+set_target_properties(sonobulus PROPERTIES OUTPUT_NAME "sonobulus.out")
+
 qt_add_qml_module(sonobulus
     URI sonobulus
     VERSION 1.0
@@ -89,6 +93,7 @@ qt_add_qml_module(sonobulus
 )
 
 target_include_directories(sonobulus PRIVATE 
+    ${CMAKE_SOURCE_DIR}/src/
     ${rtaudio_SOURCE_DIR}
     ${rtmidi_SOURCE_DIR}
     ${libconfig_SOURCE_DIR}/lib
diff --git a/src/LoggerService.cpp b/src/LoggerService.cpp
index 4217009..59bf9f6 100644
--- a/src/LoggerService.cpp
+++ b/src/LoggerService.cpp
@@ -7,6 +7,7 @@
 #include <iomanip>
 #include <fstream>
 #include <filesystem>
+#include <algorithm>
 
 namespace fs = std::filesystem;
 
diff --git a/src/synth/Instruments/PianoString.cpp b/src/synth/Instruments/PianoString.cpp
index 63bc05b..583ed89 100644
--- a/src/synth/Instruments/PianoString.cpp
+++ b/src/synth/Instruments/PianoString.cpp
@@ -37,7 +37,7 @@ void PianoString::noteOn(float frequency, float velocity) {
     }
     // apply the velocity impulse
     for(size_t i = 0; i < segmentCount_ + 1; i++) {
-        float v0 = impulseVelocity_ * std::exp(-1.0f * (stringX_[i] - strikePosition_*L_)*(stringX_[i] - strikePosition_*L_) / ((2.0f * impulseWidth_)*(2.0f * impulseWidth_)));
+        float v0 = velocity * impulseVelocity_ * std::exp(-1.0f * (stringX_[i] - strikePosition_*L_)*(stringX_[i] - strikePosition_*L_) / ((2.0f * impulseWidth_)*(2.0f * impulseWidth_)));
         stringY_current_[i] = stringY_current_[i] + dt_ * v0;
     }
 
diff --git a/src/synth/Instruments/PianoString.hpp b/src/synth/Instruments/PianoString.hpp
index e8ea74b..faa8440 100644
--- a/src/synth/Instruments/PianoString.hpp
+++ b/src/synth/Instruments/PianoString.hpp
@@ -50,7 +50,7 @@ private:
     float mu_ = crossSectionalArea_ * rho_; // linear mass density
     float waveVelocity_ = std::sqrt(stringTension_ / mu_); // transverse wave velocity
     float L_ = 1.0f; // length of string at a given frequency
-    float gain_ = 0.3f;
+    float gain_ = 0.5f;
 
     // f0_ = waveVelocity_ / (2.0f * stringLength_); // fundamental frequency of a non-stiff string
     // f1_ = f0_ * std::sqrt(1.0f + stiffness_); // fundamental frequency of the stiff string
diff --git a/src/synth/MidiController.cpp b/src/synth/MidiController.cpp
index c7c2afd..3abc3cb 100644
--- a/src/synth/MidiController.cpp
+++ b/src/synth/MidiController.cpp
@@ -18,7 +18,11 @@ MidiController::MidiController(ConfigService* config, LoggerService* logger, Not
         logger_->log("MIDI", LogFlag::Warning, msg);
     }
     
+#ifdef WIN32
     openDefaultPort();
+#else
+    openPort(1);
+#endif
 }
 
 MidiController::~MidiController() {