import speech_recognition as spr
def analyse(file_path):
    ''' returns the transcripted audio, or None if the analysis fails '''
    recognizer = spr.Recognizer()
    with sr.AudioFile(file_path) as source:
        audio = r.record(source)

    try:
        string = r.recognize_google(audio)
    except spr.UnknownValueError:
        log.log("Audio file is broken or not an audio file")
        return None
    except spr.RequestError as e:
        log.log("Could not connect to google API: {}".format(e))
        return None

    return string