[
    {
        "role": "user",
        "content": "how%20many%20inputs%20and%20outputs%20does%20the%20Behringer%20U-PHORIA%20UMC1820%20audio%20interface-"
    },
    {
        "role": "assistant",
        "content": "The Behringer U-PHORIA UMC1820 is an \u201c18-in / 20-out\u201d USB audio/MIDI interface. ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))\n\nHere\u2019s the breakdown:\n\n---\n\n### Analog Inputs & Outputs\n\n**Analog Inputs**  \n- 8 XLR/TRS combo preamps for mic/line/Hi-Z sources (2 on front panel, 6 on rear) ([fullcompass.com](https://www.fullcompass.com/prod/261769-Behringer-U-PHORIA-UMC1820?utm_source=openai))  \n\n**Analog Outputs**  \n- 10 TRS line\u2010level outputs:  \n  \u2022 2 \u201cmain\u201d balanced TRS outputs for studio monitors ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))  \n  \u2022 8 other line outputs for outboard gear, secondary monitors, etc. ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1250276-REG/behringer_u_phoria_umc1820_usb.html?utm_source=openai))  \n- 2 front\u2010panel headphone outputs (1/4\") with independent level controls ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))  \n\n---\n\n### Digital & Other I/O\n\n- **ADAT optical I/O**: 1 optical input, 1 optical output; supports ADAT and S/MUX formats up to 96 kHz. ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))  \n- **Coaxial S/PDIF I/O**: 1 input and 1 output via RCA connectors ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))  \n- **MIDI I/O**: Standard 5-pin DIN MIDI input and output jacks ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))  \n\n---\n\nSo putting it all together:\n\n- **Total Inputs**: 18 (8 analog + additional from ADAT + S/PDIF) ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1821217-REG/behringer_umc1820_audiophile_18x20_24_bit_96khz_usb.html/overview?utm_source=openai))  \n- **Total Outputs**: 20 (10 analog line outs + ADAT + S/PDIF + headphone outputs / main outs) ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1821217-REG/behringer_umc1820_audiophile_18x20_24_bit_96khz_usb.html/overview?utm_source=openai))  \n\nIf you want channel-by-channel counts (how many are analog vs. digital etc.), I can detail those too."
    },
    {
        "role": "user",
        "content": "i%20do%20not%20understand%20.%20you%20say%20there%20are%2018%20inputs%20and%2020%20outputs.%20but%20there%20are%20only%208%20input%20sockets%20and%208%20output%20sockets"
    },
    {
        "role": "assistant",
        "content": "Good question \u2014 the \u201c18 inputs / 20 outputs\u201d claim isn\u2019t just referring to physical sockets. It includes **both** physical analog I/O *and* digital I/O (via ADAT & S/PDIF). Here\u2019s how it works for the Behringer UMC1820, explained step by step:\n\n---\n\n## What you physically see\n\nAnalog sockets you can touch:\n\n- 8 inputs (combo XLR/TRS jacks) for mic/line/instrument. ([manuals.plus](https://manuals.plus/mg/behringer/umc1820-interface-with-midas-mic-preamplifiers-manual?utm_source=openai))  \n- Analog outputs:\n  - 8 line outputs (\u00bc\" TRS) ([fullcompass.com](https://www.fullcompass.com/prod/261769-Behringer-U-PHORIA-UMC1820?utm_source=openai))  \n  - 2 main monitor outputs (\u00bc\" TRS) ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1250276-REG/behringer_u_phoria_umc1820_usb.html?utm_source=openai))  \n- 2 headphone outputs (\u00bc\") up front. ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1821217-REG/behringer_umc1820_audiophile_18x20_24_bit_96khz_usb.html/overview?utm_source=openai))  \n\nSo, physically you might count 8 input sockets (analog) and 10 analog output sockets (8 line outs + 2 main outs), plus 2 more headphone outs. Many people think \u201cOh, that\u2019s only 8 in and ~12 out\u201d \u2014 which is true if you only consider the analog ones.\n\n---\n\n## What \u201c18 inputs / 20 outputs\u201d means\n\nThe extra inputs/outputs come from the digital side:\n\n- **Digital Inputs**:\n  - ADAT (optical) input = up to 8 more input channels over optical ADAT (or 4 in S/MUX mode at higher sampling rates) ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1821217-REG/behringer_umc1820_audiophile_18x20_24_bit_96khz_usb.html/overview?utm_source=openai))  \n  - S/PDIF input = adds 1 or 2 digital inputs depending on mode. ([manuals.plus](https://manuals.plus/m/1f9c4e35ce0567227ce155fe21ba5b19afc1f5bd4bcfbe653839d8f089e2bc65?utm_source=openai))  \n\n- **Digital Outputs**:\n  - ADAT output: up to 8 more output channels over optical ADAT/S-MUX. ([markertek.com](https://www.markertek.com/Attachments/Manuals/Behringer/UMC1820-Manual.pdf?srsltid=AfmBOorKq4LEGsCbpqsaxfrE-V-wYgRLzYwxThdcoUDcuOLkAVYJROXx&utm_source=openai))  \n  - S/PDIF output similarly adds digital output. ([manuals.plus](https://manuals.plus/mg/behringer/umc1820-interface-with-midas-mic-preamplifiers-manual?utm_source=openai))  \n\nSo when you add together:\n\n- 8 analog inputs + digital inputs (ADAT + S/PDIF) = **18 inputs** total. ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1821217-REG/behringer_umc1820_audiophile_18x20_24_bit_96khz_usb.html/overview?utm_source=openai))  \n- 10 analog outputs + digital outputs (ADAT + S/PDIF) = **20 outputs** in total. ([musiciansfriend.com](https://www.musiciansfriend.com/pro-audio/behringer-u-phoria-umc1820-usb-audio-interface/j41842000000000?utm_source=openai))  \n\n---\n\n## Example breakdown\n\nHere\u2019s how the counts add up when all digital I/O is being used:\n\n| Input Type | Number of Channels | Output Type | Number of Channels |\n|------------|---------------------|-------------|---------------------|\n| Analog inputs (combo jacks) | 8 | Analog outputs (line + main) | 10 |\n| ADAT inputs | 8 | ADAT outputs | 8 |\n| S/PDIF input | 2 | S/PDIF output | 2 |\n| \u2014 | \u2014 | Headphone outputs (if counted separately) | 2 (but usually included within analog/counting scheme) |\n\nTotal: **18 inputs** (8 + 8 + 2) and **20 outputs** (10 + 8 + 2) ([bhphotovideo.com](https://www.bhphotovideo.com/c/product/1025700-REG/behringer_u_phoria_umc1820_audiophile_18x20_24bit_96khz_interface.html/overview?utm_source=openai))\n\n---\n\nIf you like, I can show you what that looks like in a DAW so you can see channels 1-18/-20 even if nothing is plugged into all sockets. Do you want that?"
    },
    {
        "role": "user",
        "content": "can%20i%20use%20the%20didgital%20outputs%20tinto%20a%20analogue%20mixing%20desk"
    },
    {
        "role": "assistant",
        "content": "Yes \u2014 you **can** use the digital outputs (like ADAT or S/PDIF) from the Behringer UMC1820 to feed an analog mixing desk, but you\u2019ll need some extra conversion gear. Here\u2019s a breakdown of what you\u2019ll need and what to watch out for.\n\n---\n\n## What the UMC1820 can do\n\n- It outputs digital audio through **ADAT (optical lightpipe)** and **S/PDIF (coaxial RCA)** ([cameratim.com](https://www.cameratim.com/reviews/audio/behringer-u-phoria-umc1820-audio-interface/?utm_source=openai)).  \n- It does **not** convert digital signals to analog itself \u2014 those signals remain digital until they reach a digital-to-analog converter (DAC) ([mediadl.musictribe.com](https://mediadl.musictribe.com/media/PLM/data/docs/0805-AAN/QSG_BE_0805-AAN_UMC1820_WW.pdf?utm_source=openai)).\n\n---\n\n## What you need to convert digital outputs to analog\n\nTo use those digital outputs with an analog-only mixing desk, you\u2019ll need a **standalone digital-to-analog converter** (DAC) or a device/module that takes ADAT or S/PDIF in and gives you analog line outs. \n\n- **ADAT\u2192Analog converter**: There are devices that take an ADAT input and convert it into multiple analog outputs (e.g. 8 channels). The Aphex 141B is one example. ([performanceaudio.com](https://www.performanceaudio.com/products/aphex-141b-8-channel-adat-to-analog-converter?utm_source=openai))  \n- **S/PDIF\u2192Analog converter**: This exists too, though usually it only handles stereo or 2-channel signals because S/PDIF is typically limited to two channels.  \n\n---\n\n## How you might set it up\n\nHere\u2019s a typical workflow:\n\n1. On the UMC1820, route the audio you want out via ADAT or S/PDIF.\n2. Connect the corresponding ADAT or S/PDIF output to your DAC/ADAT-to-analog converter.\n3. From the DAC, take the analog outputs (usually balanced line-outs) into your mixing desk's line-level inputs.\n4. Make sure **clock settings** match between UMC1820 and the converter to avoid clicks/pops or sync issues. Choose the correct sample rate (e.g. 44.1 or 48 kHz), and ensure the ADAT/SPDIF digital interface is enabled on the UMC1820. ([mediadl.musictribe.com](https://mediadl.musictribe.com/media/PLM/data/docs/0805-AAN/QSG_BE_0805-AAN_UMC1820_WW.pdf?utm_source=openai))  \n\n---\n\n## Things to be aware of / limitations\n\n- **Number of channels**: ADAT supports 8 channels at standard sample rates (44.1 / 48 kHz), but fewer at higher rates like 96 kHz because of S/MUX mode. So you might not get, say, 18 analog outputs \u2014 just the number your converter can handle. ([cameratim.com](https://www.cameratim.com/reviews/audio/behringer-u-phoria-umc1820-audio-interface/?utm_source=openai))  \n- **Latency & routing**: Even though it\u2019s a wired analog setup, going through digital and back to analog adds processing and latency. Also, routing must be handled in your DAW or via routing software \u2014 these digital outputs are not automatically mapped to analog inputs of your mixer. The UMC1820 can\u2019t directly feed its ADAT outputs with its analog inputs automatically. You\u2019ll need to manage that through software. ([reddit.com](https://www.reddit.com/r/Behringer/comments/1iqf670?utm_source=openai))  \n- **Quality of DAC**: Not all converters are equal. Better DACs offer cleaner, quieter analog outs, which is important for mixing desks since noise gets amplified downstream.  \n\n---\n\nIf you tell me which kind of mixing desk you have (brand/model and how many analog inputs it has), I can suggest compatible converters and show how you\u2019d patch it all up."
    },
    {
        "role": "user",
        "content": "where%20can%20I%20buy%20these%20converters%20and%20how%20muck"
    },
    {
        "role": "assistant",
        "content": "Yes \u2014 here are some converters you can buy, with prices, features, and where to purchase in the U.S. (approximate prices in USD).\n\n---\n\n## Recommended Converters & Prices\n\n| Model | Channels / I/O | Key Features | Price Estimate |\n|---|---|---|---|\n| **Aphex 141B** | 8 ADAT in \u2192 8 analog out | Rack-mount, 48kHz ADAT to balanced line-outs | ~$399 ([karlieshop.com](https://www.karlieshop.com/product/aphex-141b-8-channel-adat-to-analog-converter-2025?utm_source=openai)) |\n| **Lucid ADA8824** | 8 analog \u2194 ADAT / AES | 24-bit, 96 kHz sample rates, multiple digital format support | ~$310\u2013$400 (used or discounted) ([signalprocessorgo.com](https://signalprocessorgo.com/ada8824?utm_source=openai)) |\n| **Behringer ADA8200** | 8 analog in/out + ADAT | Pres with ADAT, affordable way to expand I/O | ~$179 ([adorama.com](https://www.adorama.com/lists/analog-to-digital-audio-converters?utm_source=openai)) |\n| **Ferrofish Pulse8 AE** | 8 analog in/out + 8 ADAT channels | Balanced TRS all around, 192 kHz, premium build | ~$699 ([bhphotovideo.com](https://www.bhphotovideo.com/c/buy/AD-DA-Converters/ci/14831/pn/2?utm_source=openai)) |\n\n---\n\n## Where to Buy in the U.S.\n\n- **Major pro audio retailers**  \n  - B&H Photo Video \u2014 wide selection, especially for Ferrofish, RME, etc. ([bhphotovideo.com](https://www.bhphotovideo.com/c/buy/AD-DA-Converters/ci/14831/pn/5?utm_source=openai))  \n  - Sweetwater, Guitar Center \u2014 good for ADA8200, Aphex, used gear  \n  - Adorama \u2014 good deals and coupons can help lower prices ([adorama.com](https://www.adorama.com/lists/analog-to-digital-audio-converters?utm_source=openai))  \n\n- **Used/secondhand**  \n  - Reverb.com \u2014 for used converters like ST Audio ADC DAC 3000. Prices are lower but condition and shipping matter. ([reverb.com](https://reverb.com/item/3583105-st-audio-adc-dac-3000-analog-to-adat-converter?utm_source=openai))  \n  - Local classifieds, Facebook Marketplace \u2014 might find ADA8200s, or older Aphex/Lucid units\n\n---\n\n## What to Look for & Consider\n\n- **Channel count you need** \u2014 if you just need 2 outputs, a stereo converter will cost much less; gear like the ADA8200 or Aphex 141B give 8 channels \u2014 if you don\u2019t need all, you may save by going smaller.  \n- **Sample rate compatibility** \u2014 if you plan to run at 96 kHz or above, check if the unit supports SMUX mode or equivalent.  \n- **Analog I/O type** \u2014 balanced TRS or unbalanced might matter depending on your desk; confirm matching types or whether adapters needed.  \n- **Latency & clocking** \u2014 ensure the converter can sync (word clock or internal clock sync) with your UMC1820 to avoid audio glitches.  \n\n---\n\nIf you tell me which size works (e.g. 2-channel, 8-channel) and how much you want to spend, I can narrow it down to a few units that match your budget."
    }
]