Balancing levels of audio signals

Hi,

I have got two audio intervals named m_ref and m_test. The former consists of signal vector y1, and the latter consist of y1 + a variable level (in dB) of signal vector y2.

They are defined as follows:

m_ref = y1;

m_test = y1 + 10^(M.VAR/20)*y2;

I want to balance the loudness levels of m_test and m_ref so they are the same . E.g. using rms(x):

m_test = m_test / rms(m_test) * rms(m_ref);

Gives the error below:

Not enough input arguments.

Error in rms (line 24)

y = sqrt(mean(x.*conj(x), dim)); % works for complex vectors, too

Error in abs_threshold_colorationuser (line 26)

m_test = m_test / rms(m_test) * rms(m_ref);

[Marius Tøndel Eliassen]

To answer myself, I got the error because I didn't specify that I got two 2 channel signals:

m_test = m_test,2 / rms(m_test,2) * rms(m_ref,2);

However, it doesn't seem to do what I want yet, which is to equalize the levels so m_test = m_ref. Anyone?