2 files changed, 16 insertions, 12 deletions
diff --git a/pkg/ttymididrv/driver.go b/pkg/ttymididrv/driver.go
index cc7b1fd..f2282df 100644
--- a/pkg/ttymididrv/driver.go
+++ b/pkg/ttymididrv/driver.go
@@ -3,19 +3,19 @@ package ttymididrv
 import (
 	"sync"
 
-	"gitlab.com/gomidi/midi/mid"
+	"gitlab.com/gomidi/midi"
 )
 
 type driver struct {
 	mu     sync.RWMutex
-	outs   []mid.Out
-	opened []mid.Port
+	outs   []midi.Out
+	opened []midi.Port
 	closed bool
 }
 
-func New(name string, baud int) mid.Driver {
+func New(name string, baud int) midi.Driver {
 	d := &driver{}
-	d.outs = []mid.Out{
+	d.outs = []midi.Out{
 		&out{
 			name:   name,
 			baud:   baud,
@@ -35,7 +35,7 @@ func (d *driver) Close() (err error) {
 	d.mu.RLock()
 	if d.closed {
 		d.mu.RUnlock()
-		return mid.ErrClosed
+		return midi.ErrPortClosed
 	}
 	d.mu.RUnlock()
 
@@ -50,23 +50,23 @@ func (d *driver) Close() (err error) {
 	return
 }
 
-func (d *driver) Ins() ([]mid.In, error) {
+func (d *driver) Ins() ([]midi.In, error) {
 	d.mu.Lock()
 	defer d.mu.Unlock()
 
 	if d.closed {
-		return nil, mid.ErrClosed
+		return nil, midi.ErrPortClosed
 	}
 
 	return nil, nil
 }
 
-func (d *driver) Outs() ([]mid.Out, error) {
+func (d *driver) Outs() ([]midi.Out, error) {
 	d.mu.Lock()
 	defer d.mu.Unlock()
 
 	if d.closed {
-		return nil, mid.ErrClosed
+		return nil, midi.ErrPortClosed
 	}
 
 	return d.outs, nil
diff --git a/pkg/ttymididrv/out.go b/pkg/ttymididrv/out.go
index 3e16cff..4932190 100644
--- a/pkg/ttymididrv/out.go
+++ b/pkg/ttymididrv/out.go
@@ -1,6 +1,7 @@
 package ttymididrv
 
 import (
+	"fmt"
 	"sync"
 
 	"github.com/tarm/serial"
@@ -73,7 +74,10 @@ func (o *out) Underlying() interface{} {
 	return o.port
 }
 
-func (o *out) Send(b []byte) error {
+func (o *out) Write(b []byte) (int, error) {
 	_, err := o.port.Write(b)
-	return err
+	if err != nil {
+		return 0, fmt.Errorf("could not write to port: %w", err)
+	}
+	return len(b), nil
 }