made white noise test coordinate-wise
made white noise test coordinate-wise

stefan-balke/librosa,carlthome/librosa,ruohoruotsi/librosa,stefan-balke/librosa,stefan-balke/librosa,ruohoruotsi/librosa,Cortexelus/librosa,carlthome/librosa,Cortexelus/librosa,r9y9/librosa,Cortexelus/librosa,r9y9/librosa,ruohoruotsi/librosa,r9y9/librosa,carlthome/librosa