Add sound generation api (#9)

* Add missing attributes for VoiceResponseModel

* Updating module to point to forked repo

* Tidying up go.mod

* Adding missing voice settings

* Adding support for request stitching

* Adding support for request stitching

* Fix dup SharingOptions struct from merge

* Add Sound Generation API

* Fix: revert user-agent/package url to original

client/sound_gen.go

@@ -0,0 +1,98 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/taigrr/elevenlabs/client/types"
+)
+
+// SoundGenerationWriter generates a sound effect from text and writes it to the provided writer.
+// If durationSeconds is 0, it will be omitted from the request and the API will determine the optimal duration.
+// If promptInfluence is 0, it will default to 0.3.
+func (c Client) SoundGenerationWriter(ctx context.Context, w io.Writer, text string, durationSeconds, promptInfluence float64) error {
+	params := types.SoundGeneration{
+		Text:            text,
+		PromptInfluence: 0.3, // default value
+	}
+
+	if promptInfluence != 0 {
+		params.PromptInfluence = promptInfluence
+	}
+	if durationSeconds != 0 {
+		params.DurationSeconds = durationSeconds
+	}
+
+	body, err := c.requestSoundGeneration(ctx, params)
+	if err != nil {
+		return err
+	}
+	defer body.Close()
+	_, err = io.Copy(w, body)
+	return err
+}
+
+// SoundGeneration generates a sound effect from text and returns the audio as bytes.
+// If durationSeconds is 0, it will be omitted from the request and the API will determine the optimal duration.
+// If promptInfluence is 0, it will default to 0.3.
+func (c Client) SoundGeneration(ctx context.Context, text string, durationSeconds, promptInfluence float64) ([]byte, error) {
+	params := types.SoundGeneration{
+		Text:            text,
+		PromptInfluence: 0.3, // default value
+	}
+
+	if promptInfluence != 0 {
+		params.PromptInfluence = promptInfluence
+	}
+	if durationSeconds != 0 {
+		params.DurationSeconds = durationSeconds
+	}
+
+	body, err := c.requestSoundGeneration(ctx, params)
+	if err != nil {
+		return nil, err
+	}
+	defer body.Close()
+
+	var b bytes.Buffer
+	_, err = io.Copy(&b, body)
+	if err != nil {
+		return nil, err
+	}
+	return b.Bytes(), nil
+}
+
+func (c Client) requestSoundGeneration(ctx context.Context, params types.SoundGeneration) (io.ReadCloser, error) {
+	url := c.endpoint + "/v1/sound-generation"
+	client := &http.Client{}
+
+	b, err := json.Marshal(params)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewBuffer(b))
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("xi-api-key", c.apiKey)
+	req.Header.Set("User-Agent", "github.com/taigrr/elevenlabs")
+	req.Header.Set("accept", "audio/mpeg")
+
+	res, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if res.StatusCode != http.StatusOK {
+		res.Body.Close()
+		return nil, fmt.Errorf("unexpected status code: %d", res.StatusCode)
+	}
+
+	return res.Body, nil
+}