Can I also stream the played sound to a file?

[dhairya0904]

Hi

I have a use case where I want to play the sound and also stream this to file to play it again.

package main

import (
	"log"
	"os"
	"time"

	"github.com/faiface/beep"
	"github.com/faiface/beep/mp3"
	"github.com/faiface/beep/speaker"
)

func main() {

	s1 := getStream("./Lame_Drivers_-_01_-_Frozen_Egg.mp3")
	s2 := getStream("./Miami_Slice_-_04_-_Step_Into_Me.mp3")

	defer s1.Close()
	defer s2.Close()

	speaker.Init(48000, 2048)
	mixer := &beep.Mixer{}
	// done := make(chan bool)
	speaker.Play(mixer)

	mixer.Add(s1)
	mixer.Add(s2)

	time.Sleep(2 * time.Minute)
}

func getStream(file string) beep.StreamSeekCloser {
	f, err := os.Open(file)
	if err != nil {
		log.Fatal(err)
	}

	streamer, _, err := mp3.Decode(f)
	if err != nil {
		log.Fatal(err)
	}

	return streamer
}

I want this sound to be saved in a file, such that I can play the entire stream again.
Can anyone please help me with this?
Any help is appreciated

[MarkKremer]

Hi 👋 thank you for using Beep!

You can save audio to a file using the wav.Encode() function. Other encoding formats aren't supported currently.

Note that this repository is archived, but you can find our active fork over at https://github.com/gopxl/beep.

[dhairya0904]

@MarkKremer
I tried this but somehow the output file is too big.

package main

import (
	"log"
	"os"

	"github.com/faiface/beep"
	"github.com/faiface/beep/mp3"
	"github.com/faiface/beep/wav"
)

func main() {

	s1 := getStream("./Lame_Drivers_-_01_-_Frozen_Egg.mp3")
	s2 := getStream("./Miami_Slice_-_04_-_Step_Into_Me.mp3")

	defer s1.Close()
	defer s2.Close()

	mixer := &beep.Mixer{}
	mixer.Add(s1)
	mixer.Add(s2)

	outFile, err := os.Create("mixed_audio.wav")
	if err != nil {
		log.Fatal(err)
	}
	defer outFile.Close()

	err = wav.Encode(outFile, mixer, beep.Format{SampleRate: 48000, NumChannels: 2, Precision: 2})
	if err != nil {
		log.Fatal(err)
	}
}

func getStream(file string) beep.StreamSeekCloser {
	f, err := os.Open(file)
	if err != nil {
		log.Fatal(err)
	}

	streamer, _, err := mp3.Decode(f)
	if err != nil {
		log.Fatal(err)
	}

	return streamer
}

[MarkKremer]

Discussion continued in gopxl/beep#148