# I/O Mix

### Input and Output Every patch needs an output, and almost every patch needs an input. Drop in these blocks to start off your design. Here's a bypass.

The output block has a control panel.

| Parameter | Description | Range | | ------------ | ------------------------ | --------------- | | Input Gain 1 | Multiplier for input 1 | -24.0 -> 0.0 dB | | Input Gain 2 | Multiplier for input 2 | -24.0 -> 0.0 dB | | Mono | Sums input 1 and input 2 | on/off | | Offset | Don't use it | leave it off | ### Volume Provides a multiplicative control over a single signal. Can be used for audio or control signals.

| Parameter | Description | Range | | ---------- | -------------------------- | --------------- | | Input gain | Multiplies the input value | -24.0 -> 0.0 dB | ### Gain Boost Provides a multiplicative boost in 6 dB steps for a single signal. Can be used for audio or control signals.

| Parameter | Description | Range | | --------- | -------------------------- | --------------------------- | | Gain | Multiplies the input value | 6 dB to 48 dB in 6 dB steps | ### Phase Invert Multiplies the input signal by -1.0, inverting its phase.

### Crossfade Implements a linear fade between 0 and 1 on one side and 1 to 0 on the other side. Generally speaking this results in a -6 dB dip at the center point, but it's quite efficient in terms of instructions. It is based on [this code](http://spinsemi.com/knowledge_base/coding_examples.html#Cross_fading) at Spin's Knowledge Base. Using the control panel, you can add a gain reduction factor at the input if you like.

| Parameter | Description | Range | | ------------ | ---------------------- | --------------- | | Input 1 Gain | Multiplier for input 1 | -12.0 -> 0.0 dB | | Input 2 Gain | Multiplier for input 2 | -12.0 -> 0.0 dB | ### Crossfade 2 Implements a 2-segment gain curve as shown. This results in a +6 dB boost when the control value is 0.5.

### Crossfade 3 This implements another 2-segment curve, which should give 0 dB combined gain in the middle. There will be some deviation from optimum in other areas of the curve. This one requires the most instructions of the Crossfades.

### Panner Takes a single input and pans it between two outputs using a linear curve.

| Parameter | Description | Range | | ---------- | ---------------- | ------------------------- | | Input Gain | Input multiplier | -12.0 -> 0.0 dB by 1.0 dB | ### 2:1 Mixer Mixes two signals together to a single output. Input gain controls for each input are available in the control panel. The input signal is multiplied by the control value if the control input is connected. It is not necessary to connect the control inputs.

| Parameter | Description | Range | | ------------ | ---------------------- | ----------------------------- | | Input Gain 1 | Multiplier for input 1 | -18.0 -> 0.0 dB in 1 dB steps | | Input Gain 2 | Multiplier for input 2 | -18.0 -> 0.0 dB in 1 dB steps | ### 2:1 (x2) Mixer

This puts two 2:1 Mixers into a single block, just for convenience. ### 3:1 Mixer Just like the 2:1 mixer except with 3 inputs and 3 control inputs.

### 4:1 Mixer Just like the 2:1 mixer except with 4 inputs and 4 control inputs.