hello, i am a musician, but new to recording work. i wish to do a professional quality recording in the most affordable way. so i prefer to buy a firewire interface rather than a usb interface. a yamaha personal firewire interface GO46 has caught my attention. it has two firewire ports, both are 6-pin type. however, my dell laptop has only one 1394 firewire port, it is a 4-pin firewire port. after doing a lot of research, i now know that there are two kinds of firewire cable. One cable has both a 6-pin connector and a 4-pin connector, and the other cable has 6-pin connectors on each end. my questions are as follow: (1) if i use a 6-pin to 4-pin firewire cable to connect the firewire interface to my laptop, does this affect the sound quality when the sound comes to my laptop? (2) my laptop has only one 1394 firewire port, but fortunately it also has a cardbus slot. if i buy a firewire card for adding two firewire ports to my laptop, and then record the sound to an external drive instead of to the laptop drive, will this affect the sound quality also? because i am afraid that it will be just like converting a guitar cable jack plug with a jack plug converter, the sound will be losing a lot. (3) why do most of the personal firewire interface comes with two firewire ports? isn't one port is enough? thank you for your help and professional knowledge.