diff --git a/src/spessasynth_lib/synthetizer/buffer_voice/midi_channel.js b/src/spessasynth_lib/synthetizer/buffer_voice/midi_channel.js
index 9094c9e6..9d869a81 100644
--- a/src/spessasynth_lib/synthetizer/buffer_voice/midi_channel.js
+++ b/src/spessasynth_lib/synthetizer/buffer_voice/midi_channel.js
@@ -2,11 +2,9 @@ import {Voice} from "./voice.js";
 import {Preset} from "../../soundfont/chunk/presets.js";
 import { consoleColors } from '../../utils/other.js'
 import { midiControllers } from '../../midi_parser/midi_message.js'
-import { DEFAULT_GAIN } from '../synthetizer.js'
 
 const CHANNEL_LOUDNESS = 0.5;
 
-
 const dataEntryStates = {
     Idle: 0,
     RPCoarse: 1,
@@ -57,12 +55,12 @@ export class MidiChannel {
             gain: CHANNEL_LOUDNESS
         });
 
-
         // note -> panner      ->       gain -> out
         //           \-> chorus -> delay -/
         this.panner.connect(this.gainController);
         this.gainController.connect(this.outputNode);
 
+
         this.chorusController = new GainNode(this.ctx, {
             gain: 0
         });
@@ -233,7 +231,7 @@ export class MidiChannel {
 
     setExpression(val)
     {
-        val = Math.min(1, val);
+        //val = Math.min(1, val);
         this.channelExpression = val;
         this.updateGain();
     }
@@ -370,8 +368,8 @@ export class MidiChannel {
         {
             if(this.vibrato.delay === 0 && this.vibrato.rate === 0 && this.vibrato.depth === 0)
             {
-                this.vibrato.depth = 30;
-                this.vibrato.rate = 6;
+                this.vibrato.depth = 50;
+                this.vibrato.rate = 8;
                 this.vibrato.delay = 0.6;
             }
         }
diff --git a/src/spessasynth_lib/synthetizer/buffer_voice/synthesis_model.js b/src/spessasynth_lib/synthetizer/buffer_voice/synthesis_model.js
index 06fe0a32..bd616a61 100644
--- a/src/spessasynth_lib/synthetizer/buffer_voice/synthesis_model.js
+++ b/src/spessasynth_lib/synthetizer/buffer_voice/synthesis_model.js
@@ -4,13 +4,15 @@ export class SynthesisModel
 {
     /**
      * Creates a new instance of a single sample
-     * @param synthesisOptions {GeneratorTranslator}
+     * @param sampleAndGenerators {SampleAndGenerators}
+     * @param midiNote {number}
      * @param outputNode {AudioNode}
      * @param tuningRatio {number}
      * @param velocity {number}
      * @param vibratoDepth {number} in cents
      */
-    constructor(synthesisOptions, outputNode, tuningRatio, velocity, vibratoDepth) {
+    constructor(sampleAndGenerators, midiNote, outputNode, tuningRatio, velocity, vibratoDepth) {
+        const synthesisOptions = new GeneratorTranslator(sampleAndGenerators, midiNote, velocity);
         const context = outputNode.context;
         const sample = synthesisOptions.sample;
         const offsets = synthesisOptions.getAddressOffsets();
@@ -232,7 +234,7 @@ export class SynthesisModel
         // filter too
         if(this.lowpassFilter) {
             this.lowpassFilter.frequency.setValueAtTime(this.lowpassFilter.frequency.value, this.now);
-            this.lowpassFilter.frequency.linearRampToValueAtTime(this.filEnv.endHz, this.now + this.filEnv.releaseTime);
+            this.lowpassFilter.frequency.exponentialRampToValueAtTime(this.filEnv.endHz, this.now + this.filEnv.releaseTime);
         }
 
         if(!this.wavetableOscillator.loop)
diff --git a/src/spessasynth_lib/synthetizer/buffer_voice/voice.js b/src/spessasynth_lib/synthetizer/buffer_voice/voice.js
index 8c8af16b..c7afdb48 100644
--- a/src/spessasynth_lib/synthetizer/buffer_voice/voice.js
+++ b/src/spessasynth_lib/synthetizer/buffer_voice/voice.js
@@ -1,5 +1,4 @@
 import {Preset} from "../../soundfont/chunk/presets.js";
-import {GeneratorTranslator} from "./generator_translator.js";
 import { SynthesisModel } from './synthesis_model.js'
 
 export class Voice
@@ -48,7 +47,8 @@ export class Voice
          */
         this.sampleNodes = samples.map(samAndGen => {
             const sm =  new SynthesisModel(
-                new GeneratorTranslator(samAndGen, midiNote, targetVelocity),
+                samAndGen,
+                midiNote,
                 node,
                 this.tuningRatio,
                 this.velocity,
diff --git a/src/spessasynth_lib/synthetizer/synthetizer.js b/src/spessasynth_lib/synthetizer/synthetizer.js
index bc2036f1..3ea451c5 100644
--- a/src/spessasynth_lib/synthetizer/synthetizer.js
+++ b/src/spessasynth_lib/synthetizer/synthetizer.js
@@ -46,19 +46,12 @@ export class Synthetizer {
          */
         this.system = "gm2";
 
-        /**
-         * @type {WorkletChannel[]}
-         */
-        this.midiChannels = [];
 
         this.defaultPreset = this.soundFont.getPreset(0, 0);
         this.percussionPreset = this.soundFont.getPreset(128, 0);
 
         // create 16 channels
-        for (let j = 0; j < 16; j++) {
-            // default to the first preset
-            this.midiChannels[j] = new MidiChannel(this.volumeController, this.defaultPreset, j + 1, false);
-        }
+        this.midiChannels = [...Array(16).keys()].map(j => new MidiChannel(this.volumeController, this.defaultPreset, j + 1, false));
 
         // change percussion channel to the percussion preset
         this.midiChannels[DEFAULT_PERCUSSION].percussionChannel = true;
diff --git a/src/website/ui/synthesizer_ui/synthetizer_ui.js b/src/website/ui/synthesizer_ui/synthetizer_ui.js
index 46f85928..7eed7f6c 100644
--- a/src/website/ui/synthesizer_ui/synthetizer_ui.js
+++ b/src/website/ui/synthesizer_ui/synthetizer_ui.js
@@ -254,7 +254,7 @@ export class SynthetizerUI
         const expression = new Meter(this.channelColors[channelNumber],
             "Expression: ",
             0,
-            127,
+            256,
             true,
             val => {
                 this.synth.controllerChange(channelNumber, midiControllers.expressionController, val);