JavaScript How to play streaming Audio with webSocket

[TimDang]

I try to play a streaming audio from webSocket, the data returned about playload is base64 and sequance Number of playload.
I can play the audio with my code but the sound is very bad.
I think my code is the cause of the bad sound, I want the quality of sound better. How can i do? Thank!

 subject.subscribe(async (msg: any) => {

      if (msg.event === 'media') {

        if ( !this.audioBuffers[msg.streamSid]      

        ) {

             this.audioBuffers[msg.streamSid] = {

            timestamp: '',

            phone: '',

            buffer: [],

          };

          tempAudio[msg.streamSid] = {

            timestamp: [],

            payload: [],

            phone: '',

          };
        }

          tempAudio[msg.streamSid].payload[msg.sequenceNumber] =

            await this.audio_ctx.decodeAudioData(

              this.base64ToBuffer(msg.media)

            );
          var buffer = tempAudio[msg.streamSid].payload.filter(function (el) {
            return el != null;
          });

          this.audioBuffers[msg.streamSid].buffer = buffer;

            }

    });

this.audio_ctx.resume()
 const gainNode = this.audio_ctx.createGain();
while (current < this.data.length) {

        const source = this.audio_ctx.createBufferSource();

        source.buffer = this.data[current];

        gainNode.gain.value = this.isMute ? 0 : this.volume;

        gainNode.connect(this.audio_ctx.destination);

        source.connect(gainNode);
        const will_stop = new Promise((res) => (source.onended = res));

        source.start(0);

        await will_stop;

        current++;

      }