Realtime sample rate conversion from variable source

1. What are the two methods used for sampling rate conversion?
2. How is the sampling rate conversion?

What are the two methods used for sampling rate conversion?

One method is to pass the signal through D/A converter, filter it if necessary, and then to resample the resulting analog signal at the desired rate. The second method is to perform the sampling rate conversion entirely in the digital domain.

How is the sampling rate conversion?

Sample rate conversion is the process of changing a stream of discrete samples from one sample rate to another stream at a different sample rate. A sample rate converter, or resampler, is a module that implements sample rate conversion.