setup the skeletal structure for Eq, Comp and Gate.

implement strip/bus eq on commands.

internal/xair/eq.go

@@ -0,0 +1,70 @@
+package xair
+
+import "fmt"
+
+type Eq struct {
+	client      *Client
+	baseAddress string
+}
+
+// Helper function to create Eq instance for Strip
+func newEqForStrip(c *Client) *Eq {
+	return &Eq{
+		client:      c,
+		baseAddress: c.addressMap["strip"],
+	}
+}
+
+// Helper function to create Eq instance for Bus
+func newEqForBus(c *Client) *Eq {
+	return &Eq{
+		client:      c,
+		baseAddress: c.addressMap["bus"],
+	}
+}
+
+func (e *Eq) On(index int) (bool, error) {
+	address := fmt.Sprintf(e.baseAddress, index) + "/eq/on"
+	err := e.client.SendMessage(address)
+	if err != nil {
+		return false, err
+	}
+
+	resp := <-e.client.respChan
+	val, ok := resp.Arguments[0].(int32)
+	if !ok {
+		return false, fmt.Errorf("unexpected argument type for EQ on value")
+	}
+	return val != 0, nil
+}
+
+func (e *Eq) SetOn(index int, on bool) error {
+	address := fmt.Sprintf(e.baseAddress, index) + "/eq/on"
+	var value int32
+	if on {
+		value = 1
+	}
+	return e.client.SendMessage(address, value)
+}
+
+// Gain retrieves the gain for a specific EQ band on a strip or bus (1-based indexing).
+func (e *Eq) Gain(index int, band int) (float64, error) {
+	address := fmt.Sprintf(e.baseAddress, index) + fmt.Sprintf("/eq/%d/g", band)
+	err := e.client.SendMessage(address)
+	if err != nil {
+		return 0, err
+	}
+
+	resp := <-e.client.respChan
+	val, ok := resp.Arguments[0].(float32)
+	if !ok {
+		return 0, fmt.Errorf("unexpected argument type for EQ gain value")
+	}
+	return float64(val), nil
+}
+
+// SetGain sets the gain for a specific EQ band on a strip or bus (1-based indexing).
+func (e *Eq) SetGain(index int, band int, gain float64) error {
+	address := fmt.Sprintf(e.baseAddress, index) + fmt.Sprintf("/eq/%d/g", band)
+	return e.client.SendMessage(address, float32(gain))
+}