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Topic: Sluggish performance (not clicking and popping)

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  1. #1

    Sluggish performance (not clicking and popping)

    Has anyone else experienced sluggish response to MIDI? I\'m running a PIII 733 with 512MB RAM, UltraSCSI 160 controller, two Quantum 10k 4.3ms drives, Echo Gina card w/5.02 drivers.

    I have no problem getting the full 160 voice polyphony. I never have clicks or pops... but on some very simple parts I experience a sluggish response. For example, sometimes some of the drum fills will sound crammed together like GSt is having a hard time catching up.

    I have a separate PII 266 machine I use for sequencing. I\'ve never had this behavior with any of the hardware synths I have using that sequencer machine.

    Could it be that I\'ve got too much going on with a particular *port* in GSt? I know I\'ve read somewhere on here that there\'s a 64 voice limit per port. Could there also be MIDI latency issues on a per port basis?

    Any suggestions would be greatly appreciated.

    Peace,
    Tim

  2. #2
    Senior Member LHong's Avatar
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    Re: Sluggish performance (not clicking and popping)

    ============================================
    but on some very simple parts I experience a sluggish response. For example, sometimes some of the drum fills will sound crammed together like GSt is having a hard time catching up.
    ============================================
    Which MIDI-Audio-Seq do you use? Check the MIDI in/out option like in cakewalk (Cubase/Logic might be similar) \"echo mode\" set to NONE, \"send MIDI sync\" check start/stop continue, uncheck the zero controller when play stop...Giga doesn\'t like these, I guess.
    One more thing, if you have the audio track in your MIDI-SEQ make sure you set Sync clock source to audio (Logic-Audio doesn\'t have this option), in the audio option you might uncheck \"use wave out position timing\"
    Good lucks
    LHong


  3. #3

    Re: Sluggish performance (not clicking and popping)

    You have to first determine where the bottleneck is occuring. You\'ve already eliminated the first possible point in the sequencer machine. The other two points are: 1. MIDI input, or 2. the wave output in GSt. You can eliminate the second one by using a audio capture WAV driver that outputs to a file rather than a device. Something like Virtual Audio Cable would work. And no, GSt capture just parallels the WAV driver, so that doesn\'t work as a test if you are paralleling the Gina.

    If the sluggishness goes away, then that would indicate GSt is having a problem with your Gina drivers. If they remain, the bottleneck is at your MIDI input. Set all your GSt MIDI Inputs to none, in Window\'s Multimedia Properties, set MIDI Out to Nemesys MidiOut Port 1, then load a MIDIFile in Mediaplayer and play it. If there\'s no sluggishness, then your MIDI Input port is at fault. If you still experience the problem, then something is interfering with Gigastudio\'s ability to process the MIDI input.

    You could have background processes running, other apps grabbing the shared ports, or lots of swap file activity as possible culprits. Check the above possible areas first before we go further though.

  4. #4

    Re: Sluggish performance (not clicking and popping)

    Another possibiliity is shared IRQ\'s. If your soundcard is sharing an IRQ with another PCI card, or if your MIDI card is PCI and sharing an IRQ, this could cause the reported sluggishness. Click on \"Properties\" for Computer in Device Manager. It will show you a list of in use IRQ\'s. If your sound card or MIDI card shows up as sharing an IRQ, turn off your computer and move the card to a different PCI slot. This will force the PCI bus to change IRQ\'s.

    There isn\'t a way in Windows to force a change of the IRQ, but your BIOS may manually allow user selectable settings. If you do that, make sure you use the BIOS for device enumeration by going into Device Manager, System devices, click Properties, Settings tab, check \"Use Bios\", okay.

  5. #5

    Re: Sluggish performance (not clicking and popping)

    I get this choking to, at low polyphony. I have been through everything inculuding fresh installs and I am baffled. My business is at a stand still.
    My config
    ABIT BX6r2, PII400, 256MB ram, 2 ATA33 large drives at 7200rpm.
    Joytech Apollo 5465 AGP
    Win98SE, win98lite - dual boot (happens on both sys)
    Winman ISA 2x2 midi i/o
    ADAPTEC 1520b ISA SCSI cont.
    Mixtreme for GSt
    Pulsar (tried with and without)
    USB disabled. totally optimised according to forum tips etc.

  6. #6

    Re: Sluggish performance (not clicking and popping)

    Believe me I have tried everything. Now I am very IRQ savy. Everything is running on its own IRQ and memory addresses. My midi i/o is ISA on its own IRQ. I initially tried forcing IRQs with PCI steering off and device enum by bios etc no success.
    What motherboard do you use?
    Is there any problems with Cirrus Logic video chips?


    [QUOTE]Originally posted by killerbobjr:
    [B]Another possibiliity is shared IRQ\'s. If your soundcard is sharing an IRQ with another PCI card, or if your MIDI card is PCI and sharing an IRQ, this could cause the reported sluggishness.

  7. #7

    Re: Sluggish performance (not clicking and popping)

    This may or may not help.
    I found this article on a Cubase user forum. It relates to Graphics cards occasionally locking up the PCI bus in order to get better performance. I suppose it could affect midi on the PCI bus as well as it does audio.
    There\'s no mention of Cirrus Logic video chips, but that doesn\'t mean they\'ve been good boys either.
    http://www.studio201.com/cwu/editorials/vga_kills_audio.html

  8. #8

    Re: Sluggish performance (not clicking and popping)

    >>>>
    Is there any problems with Cirrus Logic video chips?
    <<<<

    If it uses bus mastering, it could potentially cause chokeups on the bus. If your video driver software has a setting for using bus mastering, turn it off.

  9. #9

    Re: Sluggish performance (not clicking and popping)

    My video card is AGP and I have ALL performance features off incl. bus mastering 3D etc.
    Anyhow I just borrowed a matrox G400 today and it STILL happened.
    Have tried taking all other cards out.
    All optimising tricks.
    I have a mixtreme and a pulsar and tried both cards and it occurs on both.
    I\'m beginning to think it\'s my MB
    ABIT BX6r2 (iBX440 chipset@100mhz)
    It seems to happen even at low cpu/polyphony.

    ATTN Tim (original post)
    What do we have in common here Tim. You didn\'t mention your motherboard, OS, video card, ram.

    I was told by a technichian that if it was my ram it would be a lot more obvious.
    I have a pair of 64MB elite 9908s and one 128MB seimens 9920s. Any sugestions?

    The ATA66 of my segate baracuder ST330630A isn\'t supported by the BX6r2 but it supports ATA33 and there is a utility to switch the drive to 33 plus the avail settings in the bios are pio mode 1-4.

    ATTN PAPA CHALK
    What ABIT boards have you had success with?

  10. #10

    Re: Sluggish performance (not clicking and popping)

    Ben, are you running both a sequencer and GSt on your Abit machine?

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