burritoman wrote:yeah I think I need ts inputs, I had trs
Sort of.
A 1/8" stereo headphone/line output, like the one from your computer, is a TRS connector, which stands for Tip/Ring/Sleeve.
When used for a stereo signal like that, a TRS connector has the left channel on the Tip, the right channel on the Ring, and the ground for the two channels on the Sleeve.
You need a cable/adapter that connects the Tip and ground (left channel) of the computer stereo TRS output to one 1/4" TS connector to plug into the MPC left input, and that connects the Ring and ground (right channel) of the computer stereo TRS output to a second 1/4" TS connector to plug into the MPC right input.
This sort of cable would normally use TS connectors for the separate left and right ends of the cable, like this cable in the image below, notice how it has a TRS 1/8" connector for the stereo signal at the computer end, and a pair of TS 1/4" connectors at the MPC end, which are labelled as Tip and Ring, and colour-coded for left and right...
Lampdog wrote:
Just because it has TS connectors at one end, does not make it the correct cable, it needs to split the stereo TRS signal with the Tip to one plug, and the Ring to the other plug. It is possible that an adapter can be a parallel adapter, as in right side of the image below, which has a pair of TS connectors, but it is not splitting a TRS/stereo signal to both ends of the cable, it is sending the same Tip/Ground signal from a TS socket to both plugs. You need the type of cable on the left, which is sending the Tip/Ground from a TRS socket to one TS plug, and the Ring/Ground from that TRS socket to the other TS plug...
Just to confuse things a little more, most commercially sold cables will have TS connectors on the MPC end of the cable, but they can have TRS connectors on the MPC end, depending on how the cable is wired up, as long as the Tip of the computer end goes to one plug at the MPC end, and the Ring of the computer end goes to the other plug at the MPC end.
TRS does not necessarily mean that it is a stereo signal, TRS connectors are also used for balanced mono signals, with the Tip being +/hot, the Ring being -/cold, and the Sleeve being ground.
You really need to understand exactly how the y-cable/adapter is wired up, and how you need it to be wired up, depending on the situation.