An integrating class D amplifier comprising: • an amplifier input , • an amplifier output , • a primary amplifier having a primary amplifier input, a primary amplifier output, a comparator, a switching power stage controlled by the comparator, and a feedback network connected between the primary amplifier output and an input of the comparator, the feedback network forming at least substantially a high pass filter , and the primary amplifier being configured to have a frequency response at least substantially as that of an integrator, and a low pass filter connected between the switching power stage and the primary amplifier output, and • a first control circuit comprising: o a first control input operatively connected to the amplifier input , o a second control input operatively connected to the primary amplifier output, and a control output operatively connected to the primary amplifier input, where: - a first path exists from the first control input to the control output, - a second path exists between the second control input and the control output, the second path comprises a first filter which is of at least first order, and the first and second paths have a common path, the common path comprising a second, low pass, filter of at least first orderwherein the first control circuit has: : • a first transfer function from the first control input to the control output and • a second transfer function from the second control input to the control output where a ratio between the first transfer function and the second transfer function at least substantially corresponds to the transfer function of an integrator over at least the frequency range of 2kHz-20kHz. • an amplifier input , • an amplifier output , • a primary amplifier having a primary amplifier input, a primary amplifier output, a comparator, a switching power stage controlled by the comparator, and a feedback network connected between the primary amplifier output and an input of the comparator, the feedback network forming at least substantially a high pass filter , and the primary amplifier being configured to have a frequency response at least substantially as that of an integrator, and a low pass filter connected between the switching power stage and the primary amplifier output, and • a first control circuit comprising: o a first control input operatively connected to the amplifier input , o a second control input operatively connected to the primary amplifier output, and o a first control input operatively connected to the amplifier input , o a second control input operatively connected to the primary amplifier output, and a control output operatively connected to the primary amplifier input, where: - a first path exists from the first control input to the control output, - a second path exists between the second control input and the control output, the second path comprises a first filter which is of at least first order, and - a first path exists from the first control input to the control output, - a second path exists between the second control input and the control output, the second path comprises a first filter which is of at least first order, and the first and second paths have a common path, the common path comprising a second, low pass, filter of at least first orderwherein the first control circuit has: : • a first transfer function from the first control input to the control output and • a second transfer function from the second control input to the control output • a first transfer function from the first control input to the control output and • a second transfer function from the second control input to the control output where a ratio between the first transfer function and the second transfer function at least substantially corresponds to the transfer function of an integrator over at least the frequency range of 2kHz-20kHz. <EOS>