diff --git a/go.sum b/go.sum
index 0537db2b..5b5ce051 100644
--- a/go.sum
+++ b/go.sum
@@ -66,6 +66,7 @@ golang.org/x/image v0.0.0-20200119044424-58c23975cae1 h1:5h3ngYt7+vXCDZCup/HkCQg
 golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/sys v0.0.0-20190913121621-c3b328c6e5a7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/revid/revid.go b/revid/revid.go
index d0d981b4..e28b44ca 100644
--- a/revid/revid.go
+++ b/revid/revid.go
@@ -211,6 +211,7 @@ func (r *Revid) reset(c config.Config) error {
 				}
 			case config.InputAudio:
 				st = mts.EncodeAudio
+				encOptions = append(encOptions, mts.TimeBasedPSI(time.Duration(r.cfg.PSITime)*time.Second))
 			default:
 				panic("unknown input type")
 			}
@@ -454,9 +455,12 @@ func (r *Revid) Start() error {
 	}
 	r.cfg.Logger.Log(logger.Info, "revid reset")
 
-	// Calculate delay between frames based on FileFPS.
+	// Calculate delay between frames based on FileFPS for video or
+	// between recording periods for audio.
 	d := time.Duration(0)
-	if r.cfg.FileFPS != 0 {
+	if r.cfg.Input == config.InputAudio {
+		d = time.Duration(r.cfg.RecPeriod * float64(time.Second))
+	} else if r.cfg.FileFPS != 0 {
 		d = time.Duration(1000/r.cfg.FileFPS) * time.Millisecond
 	}