don't resample in fetch-converter

importer/fetch_converter.go

@@ -109,7 +109,7 @@ func newFFmpegFetchConverter(job *Job) (c *ffmpegFetchConverter, err error) {
 	// c.cmd = exec.CommandContext(job.ctx, "ffmpeg", "-hide_banner", "-nostats", "-i", "-")
 	c.cmd = exec.CommandContext(job.ctx, "ffmpeg", "-nostats", "-y", "-i", "-")
 	c.cmd.Args = append(c.cmd.Args, "-map_metadata", "0", "-vn")
-	c.cmd.Args = append(c.cmd.Args, "-ar", "192k", "-codec:a", "pcm_s24le")
+	c.cmd.Args = append(c.cmd.Args, "-codec:a", "pcm_s24le")
 	c.cmd.Args = append(c.cmd.Args, "-f", "wav", filename)
 	// loudness normalization, see: http://k.ylo.ph/2016/04/04/loudnorm.html
 	c.cmd.Args = append(c.cmd.Args, "-map_metadata", "-1", "-vn")