Phd requirement on the masters

Hi everyone, So, I just got a C on my exam on the masters programme, and thinking about my future in the field keeps me up tonight. I have a dream of doing a Phd in musicology, but afraid that my grades might not be good enough. Trust me, I have searched, but cant find concrete information about PhD requirements for a masters Student. Also, is getting a less than a very good grade equivalent to a goodbye in academia?

I have a fairly long portfolio in projects about music psychology, and truly feel that I can contribute with something valuable in the field of quantitative musicology.

I would love to hear your experiences in regarding to starting a PhD programme, requirements for getting in, application processes etc

Thank you