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Thank you again Anton,

  I had thought that the account was set to default all new users to wav format.  If you are able to find out about any settings that could help I would appreciate it. I could transcode the file but it seems strange to do that if RingCentral can provided it in the required format it with just a few settings changes.

Actually we don't have neither the way to choose the format while downloading (i.e. to convert files on the fly) nor the way to configure the format programmatically. Probably you can utilize 3rd party conversion service e.g. https://aws.amazon.com/elastictranscoder/. If you are interested I can explore if there is the way to preset WAV as a default format for account, so all new users will get this setting automatically (but it is definitely possible to set the format for all existing users - you should contact customer support for it).

Thank you for your quick reply Anton,

I failed to mention that I am downloading the call recordings using the RingCentral REST API.

I am required to download all call recording in wav format; does this mean that every new and existing extension needs to be set from mp3 to wav by RingCentral?  From what I understand, users don't have access to this setting.  Perhaps there is something that I have missed in the REST API that would allow me to request a specific format?

This setting can be changed at user level not the whole account. So it can depend on who is the owner of particular call leg and corresponding recording.