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Grimm Audio AD1 User Manual

Ad1 dsd ad converter
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Please read this manual before operating the unit!

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Summary of Contents for Grimm Audio AD1

  • Page 1 Please read this manual before operating the unit!

  • Page 3: Table Of Contents

    Table of Contents Important Safety Instructions 1. Installing 2. Signal connections 3. About DSD 4. Specifications 5. Grimm Audio Limited Waranty...
  • Page 4 This manual describes how to set up the unit in your studio as well as important tips on how to get the best performance from the AD1. In addition, some back- ground information on the unitʼs operation is provided.

  • Page 5: Important Safety Instructions

    Important Safety Instructions Grimm Audio gaat er van uit dat u deze Engelstalige tekst volledig begrijpt. Als u hier moeite mee heeft dient u contact op te nemen met Grimm Audio. Op verzoek sturen wij u een vertaling toe. Grimm Audio nimmt an, dass Sie diesen Englischen Text völlig verstehen. Wenn notwendig, nehmen Sie bitte Kontakt auf mit Grimm Audio.
  • Page 6 10. Do not use this apparatus near water. 11. Do not use this apparatus outside. 12. Do not expose the apparatus to dripping or splashing. Do not place objects filled with liquids (flower vases, drink cans, coffee cups, etc) on the apparatus. 13.

  • Page 7: Installing

    Mounting the AD1 The AD1 can mount in any standard 19” rack. Make sure you leave at least 1U of space above and below the AD1, and more if the adjacent equipment runs warm.

  • Page 8: Signal Connections

    Input sensitivity Your AD1 is calibrated for a 0 DSD level of +18 dBu ±0.1dB. This equals 14 dB of headroom above a 0 VU defined as +4 dBu, which is common in mastering. Due to choices made with the ultimate sound quality in mind, this level is factory installed and cannot be calibrated.
  • Page 9 In this situation perfect data sync is needed, which means all slaving AD1ʼs need to be set to ʻTightʼ mode. The word clock inputs of these AD1ʼs are all con- nected to the word clock output of the first unit, using T-bars on every unit and terminating with a 75 Ohm terminator on the last one.

  • Page 10: About Dsd

    The AD1 runs at the DSD rate of ʻ64 fsʼ (2.8224MHz), which seems like old technol- ogy in the light of 128 or 256 fs competitors. The higher rate formats however were designed to get around technical issues related to signal processing in DAWʼs, not...
  • Page 11 DSD takes up only 2.8Mbit/s, whereas one channel of 192kHz/24bit takes up 4.6Mbit/s. Given that the AD1 puts out DSD data anyway, itʼs most eco- nomical to store the audio in this format. Converting to PCM during recording would only increase the data rate without any added benefit.
  • Page 12 If you find your DSD production system does not have the headroom needed for mixing large numbers of channels with substantial gain, this may be an indication of the DAW and/or the ADC not implementing the best possible filters and remodu- lation stages. A Grimm Audio DD1 format converter will solve this issue.

  • Page 13: Specifications

    4. Specifications Discretely build continuous-time 6th order sigma delta modulator running at 64 x 44,1 kHz or 2.822 MS/s (DSD). As shown in the block diagram, only four resis- tors separate the audio signal from the feedback DAC. Everything else is within the feedback loop.
  • Page 14 Weight: 15 kg Dimensions: 440 x 388 x 85 mm. Power consumption 8 channel box: 100 W. Wood type of front: Mahogany. Grimm Audio contact information Grimm Audio CV Kanaaldijk-Zuid 11 5611 VA Eindhoven The Netherlands +31 (0)40-213 0186 Email: info@grimmaudio.com...

  • Page 15: Grimm Audio Limited Waranty

    5. Grimm Audio Limited Warranty Grimm Audio CV (“Grimm Audio”) warrants this product to be free of defects in material and workmanship for a period of one (1) year for parts and for a period of one (1) year for labor from the date of original purchase. This warranty is enforcable only by the original retail purchaser and cannot be transferred or assigned.