Apps like Skype but without Frequency Cutoff?

Hi! I need to start a voice chat with someone else over android, but the audio I'm sending them is all under 250hz. Audio chat applications such as Google Hangouts and Skype all filter out these frequencies to increase audio clarity and reduce space, however it is crucial that the other person is able to hear very low frequencies clearly on their device.

Is there any app I can use for this?