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KnowBrainer Speech Recognition |
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Topic Title: What recording format does Dragon require? Topic Summary: Frequency, bit rate, etc. Created On: 04/09/2012 10:26 AM Status: Post and Reply |
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- gcarson | - 04/09/2012 10:26 AM |
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- Lunis Orcutt | - 04/09/2012 02:05 PM |
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- gcarson | - 04/09/2012 05:24 PM |
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- Lunis Orcutt | - 04/09/2012 06:03 PM |
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- Chucker | - 04/10/2012 08:04 AM |
 04/09/2012 10:26 AM
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I've been transcribing some dictation recorded with an Olympus LS-7, a Linear PCM recorder. I haven't been able to find any official description of the settings I should use for Dragon with this recorder, but I've been getting excellent accuracy (98-99%) using WAV mono, low microphone sensitivity and a Knowbrainer headset. The specific file format with these settings is WAV 44.1 kHZ, 16 bit, Mono. This works fine, but I noticed that Olympus Sonority, the software that comes with the LS-7, is converting the WAV files before it sends them to Dragon for transcription. I couldn't tell what it was converting them to, however. Anyway, I'm just asking about the file format Dragon requires so I can get the LS-7 set up correctly. Thanks in advance. ------------------------- Compaq 6730b laptop Intel Core 2 Duo p8400 2.26 Ghz 1.93 G RAM (available) Intel Wireless Wifi Link 5100 adapter / Windows XP SP3 / Knowbrainer purchases: Philips 9600 DPM, Knowbrainer headset microphone, Samson Airline 77, Olympus DS5000id, DNS 10.1, Knowbrainer 2008, Parrott Half Duplex VXI USB Sound Pod |
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04/09/2012 02:05 PM
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The 3 Olympus LS-7 includes 3 recording formats which are PCM (WAV), MP3 and WMA. You're already using the recorder correctly for NaturallySpeaking because the Sonority application is converting your 44.1 kHz wav files to 22.5 kHz so that Dragon can handle them. You are doing everything right, down to making monophonic recordings. The only problem with WAV files is their sheer size. As long as you don't need to e-mail your sound files as attachments, require cue review, slider control or seamless punch in for editing, this recorder will work fine with NaturallySpeaking.
Keep in mind that the Olympus LS-7 is a 94 kHz 24-bit Tresmic (3 microphone) recording studio quality recorder which is really not designed for speech recognition and doesn't include basic speech recognition amenities. Because we are in the speech recognition business, we only recommend recorders that feature Olympus 12 to 1 compressed lossless fidelity DS2 algorithms but even what we consider to be a proper digital recorder for speech recognition would likely score no higher than 98% accuracy so unless you need the other functionality, the LS-7 is performing perfectly. Just out of curiosity, it would appear that you already own an Olympus DS-5000id which for speech recognition purposes, would be considered superior in functionality, security and recording quality. Because you already own the Olympus Cadillac, we were wondering why you downgraded to the LS-7? -------------------------
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04/09/2012 05:24 PM
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Thanks. I got the LS-7 for other uses. Just wanted to see how well it worked for dictation. It's a fantastic recorder and surprisingly accurate with Dragon, but you're right about its limitations for dictation. Its biggest problem, like you said, is its total lack of editing functions like insert and append, a major handicap. Its onboard speaker isn't very loud, either, but it's better than other LPCM recorders I've tried. Several of them don't even have speakers. I use recorders for several different things: dictation, stereo recording, podcasting, etc., etc. I currently use my DS5000id for dictation and the LS-7 for everything else, but I've been looking for a "universal" recorder that combines the best features of both lines of recorders into one machine. It doesn't exist, though. There's the high-end dictation market, then there's the stereo recorder market for musicians and sound professionals. I was hoping the new Grundig Digta might do the trick since it can be used for both dictation and stereo recording. I'm assuming it's as accurate as the DS5000id for dictation, but so far I have no idea how good it is at recording stereo. You probably can't do this, but is there any chance you could post some sample stereo audio files recorded with the Digta so we could hear how it sounds? ------------------------- Compaq 6730b laptop Intel Core 2 Duo p8400 2.26 Ghz 1.93 G RAM (available) Intel Wireless Wifi Link 5100 adapter / Windows XP SP3 / Knowbrainer purchases: Philips 9600 DPM, Knowbrainer headset microphone, Samson Airline 77, Olympus DS5000id, DNS 10.1, Knowbrainer 2008, Parrott Half Duplex VXI USB Sound Pod |
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04/09/2012 06:03 PM
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We're not really in a position to create high fidelity Grundig recordings of music but your assumption is correct. The Grundig Digta 703 digital recorder is really designed to be a jack of all trades with dictation in the forefront but additionally including dual high fidelity stereo microphone elements for concert recording like the LS-7. If you're interested in this recorder, contact us off-line because the unit is MAP priced but were willing to sell it at our cost.
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04/10/2012 08:04 AM
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gcarson, -------------------------
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