feat!: display the parameters as knobs in a grid

Also removed the negbandpass & neghighpass parameters
and replaced them with bandpass & highpass set to -1, to
fit the switches better to the GUI.

Closes #51, closes #173

tracker/presets/DR/snare-sample-st.yml

@@ -0,0 +1,52 @@
+name: snare-sample-st
+comment: 'Suggested range: E-2 to C-3'
+numvoices: 1
+units:
+    - id: 217
+      parameters: {}
+      comment: Tom
+    - type: envelope
+      id: 10
+      parameters: {attack: 14, decay: 68, gain: 110, release: 0, stereo: 0, sustain: 0}
+    - type: oscillator
+      id: 200
+      parameters: {color: 48, detune: 52, gain: 53, lfo: 0, looplength: 1, loopstart: 4276, phase: 0, samplestart: 560606, shape: 81, stereo: 0, transpose: 76, type: 4}
+    - type: mulp
+      id: 202
+      parameters: {stereo: 0}
+    - id: 216
+      parameters: {}
+      comment: Snare
+    - type: envelope
+      id: 203
+      parameters: {attack: 0, decay: 68, gain: 83, release: 0, stereo: 0, sustain: 0}
+    - type: noise
+      id: 204
+      parameters: {gain: 39, shape: 2, stereo: 0}
+    - type: mulp
+      id: 205
+      parameters: {stereo: 0}
+    - type: envelope
+      id: 213
+      parameters: {attack: 47, decay: 54, gain: 128, release: 0, stereo: 0, sustain: 0}
+    - type: send
+      id: 214
+      parameters: {amount: 19, port: 0, sendpop: 1, target: 206}
+    - type: filter
+      id: 206
+      parameters: {bandpass: 0, frequency: 110, highpass: -1, lowpass: 1, resonance: 128, stereo: 0}
+    - type: filter
+      id: 207
+      parameters: {bandpass: 0, frequency: 118, highpass: 0, lowpass: 1, resonance: 112, stereo: 0}
+    - type: addp
+      id: 208
+      parameters: {stereo: 0}
+    - id: 215
+      parameters: {}
+      comment: Output
+    - type: pan
+      id: 209
+      parameters: {panning: 59, stereo: 0}
+    - type: outaux
+      id: 210
+      parameters: {auxgain: 8, outgain: 128, stereo: 1}