By default, the sample rate in Soundflower is set to44100Hz. A good question is the following one:

• 96000Hz: for high-definition audio resolution.
• 48000Hz: sampling rate of audio in DVDs.
• 44100Hz: sampling rate of audio CDs giving a 20 kHz maximum
• 32000Hz: sampling rate of audio quality a little below FM radio
• 22050Hz: sampling rate of audio quality of AM radio.

If you desire to stream at higher sample rates you need to open theAudio MIDI setupapplication that comes in macOS. Then, select the audio deviceSoundflower (2ch), and modify in bothInput/Output the sample rate to the desired value.Note that the Google Cast devices audio do not support more than96000Hz.See the picture below to have an example when the sample rate is changed from41000Hz to48000Hz:

41000Hz

48000Hz