Hi,
The pins on Arduino 168 or 328 connected to Music Shield are not the same as Mega1280 and 2560.
On 168 or 328, the SPI pins are 10,11,12,13, while on 1280 they are something else. I’m not familiar with 2560. But I think mega1280 is enough for normal use.
You can refer to the garden page of Music Shield where illustrates how to record the music based on the Seeeduino Mega v1.1 (1280).
May this helpful to you.
Regards,
Steve