diff --git a/src/audio/speaker.c b/src/audio/speaker.c
index 321f7e9d..17fc969b 100644
--- a/src/audio/speaker.c
+++ b/src/audio/speaker.c
@@ -465,15 +465,16 @@ void speaker_flush(void) {
     }
 }
 
-bool speaker_is_active(void) {
+bool speaker_isActive(void) {
     return speaker_recently_active;
 }
 
-void speaker_set_volume(int16_t amplitude) {
-    speaker_amplitude = amplitude;
+void speaker_setVolumeZeroToTen(unsigned long goesToTen) {
+    float samplesScale = goesToTen/10.f;
+    speaker_data = (int16_t)(SPKR_DATA_INIT * samplesScale);
 }
 
-double speaker_cycles_per_sample(void) {
+double speaker_cyclesPerSample(void) {
     return cycles_per_sample;
 }
 
diff --git a/src/audio/speaker.h b/src/audio/speaker.h
index 95e5ce7e..eef6e9bf 100644
--- a/src/audio/speaker.h
+++ b/src/audio/speaker.h
@@ -21,13 +21,13 @@ void speaker_destroy(void);
 void speaker_reset(void);
 void speaker_flush(void);
 void speaker_setVolumeZeroToTen(unsigned long goesToTen);
-bool speaker_is_active(void);
+bool speaker_isActive(void);
 
 /*
  * returns the machine cycles per sample
  *  - for example, emulator running at normal speed: CLK_6502 / 44.1kHz == ~23
  */
-double speaker_cycles_per_sample(void);
+double speaker_cyclesPerSample(void);
 
 #endif /* whole file */
 
diff --git a/src/timing.c b/src/timing.c
index 02911dca..a45d9908 100644
--- a/src/timing.c
+++ b/src/timing.c
@@ -141,7 +141,7 @@ static void _timing_initialize(double scale) {
     }
 #ifdef AUDIO_ENABLED
     speaker_reset();
-    //TIMING_LOG("ClockRate:%0.2lf  ClockCyclesPerSpeakerSample:%0.2lf", cycles_persec_target, speaker_cycles_per_sample());
+    //TIMING_LOG("ClockRate:%0.2lf  ClockCyclesPerSpeakerSample:%0.2lf", cycles_persec_target, speaker_cyclesPerSample());
 #endif
 }
 
@@ -326,7 +326,7 @@ void *cpu_thread(void *dummyptr) {
                 assert(!negative);
                 if (!is_fullspeed &&
 #ifdef AUDIO_ENABLED
-                        !speaker_is_active() &&
+                        !speaker_isActive() &&
 #endif
                         !video_dirty() && (!disk6.motor_off && (disk_motor_time.tv_sec || disk_motor_time.tv_nsec > DISK_MOTOR_QUIET_NSECS)) )
                 {
@@ -387,7 +387,7 @@ void *cpu_thread(void *dummyptr) {
             if (timing_should_auto_adjust_speed()) {
                 if (is_fullspeed && (
 #ifdef AUDIO_ENABLED
-                            speaker_is_active() ||
+                            speaker_isActive() ||
 #endif
                             video_dirty() || (disk6.motor_off && (disk_motor_time.tv_sec || disk_motor_time.tv_nsec > DISK_MOTOR_QUIET_NSECS))) )
                 {