Unfortunately, this means they’ve swung to the other extreme: They’ve become very reluctant and skeptical about lending to anyone that falls outside “the norm.” Working with a team that knows the ins and outs of the music industry can change that.
Because of their long, curvy waveforms, low frequencies experience phase attenuation more profoundly than other areas of the spectrum. You may want to high-pass your square wave so that it gives the bass line that extra grit without stepping on the feet of your sine’s big clear lows. Additionally, many producers like to make low-end seem fatter by using stereo widening effects. Use these carefully as the phase interactions between the low end of each stereo side can cause destructive interference. Use the mono/stereo switch on your DAW’s master track to check whether your low end survives when everything’s running through the center channel.