init speakers only once

howl/audio.go

@@ -1,27 +1,29 @@
 package howl
 
 import (
-	"fmt"
 	"io"
-	"time"
+	"log"
 
 	"github.com/faiface/beep"
 	"github.com/faiface/beep/speaker"
 	"github.com/faiface/beep/vorbis"
 )
 
-// PlayAudioStream will output a stream to device speakers
-func PlayAudioStream(as io.ReadCloser) {
-	// we decode the ogg stream
-	s, format, _ := vorbis.Decode(as)
-
-	// the sample rate is set to 12000 as s.SampleRate does
+// InitAudio inits the audio speaker
+func InitAudio() {
+	// the sample rate is set to 12000 as format.SampleRate does
 	// not return an accurate value
-	err := speaker.Init(12000, format.SampleRate.N(time.Second))
+	err := speaker.Init(12000, 12000)
 	if err != nil {
-		fmt.Println("audio: err: could not play audio stream")
+		log.Fatal("audio: could not init speaker")
 		return
 	}
+}
+
+// PlayAudioStream will output a stream to device speakers
+func PlayAudioStream(as io.ReadCloser) {
+	// we decode the ogg stream
+	s, _, _ := vorbis.Decode(as)
 
 	// channel, which will signal the end of the playback.
 	playing := make(chan struct{})

main.go

@@ -7,6 +7,8 @@ import (
 func main() {
 	// load config
 	howl.LoadConfig()
+	// init audio speakers
+	howl.InitAudio()
 	// init aws polly services
 	howl.InitPolly()
 	// connect to slack