Show audio spectrum output for audio and voices

src/main/java/com/annimon/ffmpegbot/parameters/resolvers/AudioResolver.java

@@ -61,7 +61,6 @@ public void refine(@NotNull Parameters parameters) {
                     } else {
                         parameters.enable(AudioBitrate.ID);
                     }
-
                 });
     }
 

src/main/java/com/annimon/ffmpegbot/parameters/resolvers/OutputFormatResolver.java

@@ -14,6 +14,7 @@ public class OutputFormatResolver implements ParametersResolver {
     @Override
     public void resolve(@NotNull Parameters parameters, @NotNull FileInfo fileInfo) {
         final var outputFormat = switch (fileInfo.fileType()) {
+            case AUDIO, VOICE -> new OutputFormat(List.of(AUDIO, AUDIO_SPECTRUM), AUDIO);
             case VIDEO -> forVideo(fileInfo);
             case VIDEO_NOTE -> new OutputFormat(List.of(VIDEO_NOTE, VIDEO, AUDIO, AUDIO_SPECTRUM), VIDEO_NOTE);
             case ANIMATION -> forAnimation(fileInfo);