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Routing the Solo and Main to different amps and speakers

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  • Routing the Solo and Main to different amps and speakers

    I acquired a Focusrite Scarlett 2i4. It has two stereo pairs for output. After looking through the Hauptwerk users guide, I can't figure out how to route the solo to one set of speakers and the main to the other (theater organ). Can someone tell me how this is done?

  • #2
    Although it's possible to route individual ranks or divisions to discreet channels, doing so often negates the benefits of using multiple channels in the first place. The use of multiple channels accomplishes three main things: 1). Minimizes intermodulation distortion, 2) minimizes phase cancellation, and 3) provides a wider, more dispersed sound field for clarity.

    While routing individual ranks or divisions to their own channels minimizes distortion and phase issues with other voices in other channels, these issues will still exist for the voices sharing the same channels.

    Hauptwerk provides a more optimal solution through selectable algorithms that route notes amongst all channels within a Group providing benefits for the entire instrument.

    Groups (Audio Groups) vs Channels (Audio Outputs)
    No doubt, Hauptwerk's audio configuration can be confusing and difficult to understand but is more easily comprehended by noting the purpose of Audio Groups and Audio Channels. Then the configuration breaks down to establishing one or more Audio Groups with each Group containing one or more Channels. Channels can be stereo or mono depending upon the sample set or loading option chosen. The notes of ranks assigned to each Group will be dynamically distributed to the Channels in that Group according the selected routing algorithm.

    The Purpose of Groups
    Groups are a collection of one or more Channels. For most installations, a single Group containing all Channels is all that is required. Where multiple Groups come into play is when a variety of different speakers is being used for the Channels, or when it is desired to have a group of speakers in a different location, such as an antiphonal division, or for a specific purpose, such as implementing an en chamade rank. A less common use of Groups would be to use different routing algorithms for different ranks.

    If you're using different speakers on different Channels, each type of speaker should be placed in its own Group. This insures that the stops placed in that Group will be routed to a like type of speaker.

    For example, lets suppose that you have a pair of large full range speakers, a pair of Conn pipes, and a four channel audio interface. You would create two Groups in this case, one for the full range speakers, and one for the Conn pipes. Because the Conn pipes won't handle the bass well, you'd want to consider assigning ranks that have relatively little fundamental tone, such as strings and reeds to the Conn Group, and the beefier flues and 16' stops to the full range Group.

    You define your Groups and its routing algorithm under General Settings/Audio Groups in the Hauptwerk menu.

    Purpose of Channels
    Channels correspond to the physical channels on your audio interface. Channels can be either stereo or mono. Each channel on your interface is assigned to a Group and ranks assigned to each Group are routed on a note-by-note basis to the Channels within that Group.

    For example, assuming you have a four channel interface and are using identical speakers on all Channels, you'd want to create a single Group and assign all four Channels to that Group. Hauptwerk would then distribute the ranks and notes amongst those Channels in the optimal way defined by the selected routing algorithm for the Group.

    If you were employing different types of speakers in your installation, you'd want to create multiple Groups and assign Channels as defined above.

    The Channels available to you are determined by your hardware and assigned to Groups under General Settings/Audio Output in the Hauptwerk menu.

    Stereo vs Mono
    Whether your configuration is stereo or mono depends on how your sample set was recorded and how you initially installed it. Most Hauptwerk samples I've encountered are stereo samples, but many can be loaded as mono. If you are working with a stereo sample set, each note of each rank has a position in the stereo field. For example, theatre organs often have a main chamber on the left and a solo chamber on the right. If you're working with stereo samples, it's unnecessary to define Solo and Main Groups. Solo ranks will automatically dominate the right channel, and Main chamber ranks the left but both will still be in the stereo sound field just as they would if you were listening to a stereo recording of the organ.

    If you are using mono samples, this spatial information is lost and you'd have to create individual Groups for left and right chambers.

    Assigning Stops
    In Hauptwerk, each rank is assigned to a Group when the sample set loaded initially. If you have configured multiple Groups for one of the reasons above, you will choose the appropriate Group for each stop at this time. In the case of mono samples which you want to emanate from different locations, you'd assign all Solo ranks, for example, to the Solo group you created, and all Main chamber ranks to the Main Group. You'd place the speakers for the Channels in the Main Group on the left and the speakers for the channels in the Solo Group on the right.

    Summary Answer
    The specific answer to your question depends on the speakers you are using and whether you are loading stereo or mono samples.
    • Multiple groups are only required if you are using multiple types of speakers or when using mono or stereo samples that you want to emanate from particular locations in the room, such as mono samples that you want to appear left or right, or stereo samples for an antiphonal division.
    • If using multiple speaker types, create a Group for each type of speaker and assign ranks to the Group best reproduced by that speaker type. Assign Channels to each Group either by dividing them equally amongst all Groups, or assigning them in proportion to the number of ranks that will be assigned to each Group.
    • If using stereo samples with like speakers on all channels, only one Group is necessary as the spatial information is in the sample. Assign all channels to this group.
    Last edited by Admin; 08-11-2019, 02:53 PM.

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