Many Thanks to Mb9061 and Gherreal for your responses. You have been a big help. Here's what I know (now).
First, when the minijack is plugged into the iMac it does glow red on the other end so we know the iMac is functioning properly.
Second, the MIDI setup application does not show a master stream so, as you stated, the iMac is not sensing a device on the other end. Thank you for that tip, I did not know to look there for a streaming indication.
Third, I did not know that the KAV 300i does not have it's own DAC so therein is most likely the problem. The system is not converting to an analogue signal - no wonder there is no sound!! I do not have an external DAC.
the Cyro-Parts signal converter is not a DAC.
I'll see if I can hook this all up with a friends processor to make sure that it is not the Cyro Parts Box malfunctioning (I doubt it).
As a matter of explanation the KAV 300i was recently purchased to use in a small DVD set-up for movies and works very well for that. That system is here in my Washington State home. The main system that utilizes a Krell HTS 7.1 processor (with DACs) is in our retirement home in Mexico. Since the iMac is new to me and has not been introduced into the main system I wanted to make sure all the components worked before moving it to Mexico where equipment is hard to come by. My best bet is to take the iMac and signal converter to my friend's house for a test.
Thanks again to both of you - It looks like you have me on the right track.
First, when the minijack is plugged into the iMac it does glow red on the other end so we know the iMac is functioning properly.
Second, the MIDI setup application does not show a master stream so, as you stated, the iMac is not sensing a device on the other end. Thank you for that tip, I did not know to look there for a streaming indication.
Third, I did not know that the KAV 300i does not have it's own DAC so therein is most likely the problem. The system is not converting to an analogue signal - no wonder there is no sound!! I do not have an external DAC.
the Cyro-Parts signal converter is not a DAC.
I'll see if I can hook this all up with a friends processor to make sure that it is not the Cyro Parts Box malfunctioning (I doubt it).
As a matter of explanation the KAV 300i was recently purchased to use in a small DVD set-up for movies and works very well for that. That system is here in my Washington State home. The main system that utilizes a Krell HTS 7.1 processor (with DACs) is in our retirement home in Mexico. Since the iMac is new to me and has not been introduced into the main system I wanted to make sure all the components worked before moving it to Mexico where equipment is hard to come by. My best bet is to take the iMac and signal converter to my friend's house for a test.
Thanks again to both of you - It looks like you have me on the right track.