def list_voices():
"""Returns all available voices."""
voices = []
for voice in core.list_voices():
current_voice = _repr.Voice({
'name': voice['name'],
'identifier': voice['identifier'],
'gender': voice['gender'] if voice['gender'] else None,
'age': voice['age'] if voice['age'] else None,
'variant': voice['variant'],
})
voices.append(current_voice)
return voices
