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Q&A from Analog Devices EngineerZone: SigmaDSP/SigmaStudio and DSP discussions (31 topics).
31 topics · 171 messages
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ASRC Inter Sample Peaks - ASRC Input with gain
Hello EZ, I have successfully built my own 8 channel DSP based on the ADAU1466 and AK4493 DAC's. Now that the hardware works I am trying to get the hang of the more intricate parts of the DSP world. M
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ASRC Lock on ADAU1466
Subject: ADAU1466 ASRC0 will not maintain lock with XU316 I²S (24-bit/48 kHz) Hi ADI team, Setup ADAU1466, self-boot from EEPROM verified Source: XMOS XU316 USB→I²S from Windows, 24-bit
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Using ASRC and not getting audio output from analogue connector
Hi there, Sorry, I've browsed a couple of other solutions for "similar" problems to mine, but I can't seem to put my finger on why my system isn't working. I put together a test project (attached) to
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ADAU1467 ASRC - When the inputs are not a multiple of an integer (44.1 kHz and 48 kHz)
Hello, I always get a lot of help here. We are preparing to develop a new audio system. Please check the attached file. I don't think there will be any problem with ADC (AK5574) and DAC (AK4468). But
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ADAU1467 ASRC Lock Bits
Hey together, I have a question regarding the ASRC Lock bits. I know that the lock bits are ACTIVE_LOW. Meaning 0x0000 would tell me everything is locked. So far this works as expected. But there is a
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Syncing output to input using ASRC
I’m using the ADAU1466 running at a 48 kHz sampling rate for a project. I have a digital input that will accept either 44.1 or 48 kHz sampling rate, going through an ASRC at input to sync it to the DS
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DC Offsets Through ASRCs
Hello, We've implemented a source select mechanism to switch between the three types of digital inputs on our amplifier design. We were noticing large, visible speaker excursions while performing swit
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ADAU1452 ASRC lock status inconsistent
Hello! I am using an ADAU1452 for playing sound off a TI PCM2707 USB -> I2S bridge. For automatic channel switching and automatic mute, I employ the ASRC lock register (0xF580). With it, I check the s
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Need help for ASRC lock noise and GPIO output
Hi my design has 5 input channels to ASRC and I figure out that sometimes noise coming out when ASRC is locking and I searched the answers to solve this problem and I found the only way out but someti
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ADAU145x datasheet ASRC group delay calculation
On page 81 of Rev.D of the ADAU145c datasheet there are calculations for the ASRC group delay : The same equations appear in the AD1895 datasheet, so surely they must be correct. In the first equation
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ADAU1452 ASRC not working
Hi, Since two days im trying to get asyncronous input sources to work via the ASRC of the ADAU1452. The DSP is working fine with synchronous sources! As you can see in the bunch of pictures below (sor
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ADAU1467 ASRC
Have noted that its possible to use sample rates higher that 192k as input to the asrc, for example 384k. Have tested it on the adau1467 eval board. The ASRC0_RATIO register 0xF582 correctly responds
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ADAU1462: loud pop/click when audio starts
Just completed a board that uses the ADAU1462to read audio through the S/PDIF optical input. The design closely follows the ADAU1466 evaluation board, with a self-boot EEPROM (which I successfully pro
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ADAU1466 - ASRC - is digital filtering involved?
Hi, I just wanted to know if using the ASRCs involves digital filtering as it is done like in an AD1896? Video Products Audio Signal Processors Sample Rate Converters ad1896 SigmaDSP Audio Processors
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How to Implement Single Input Connection with Various Sample Rates
Hi, I have viewed the following thread : https://ez.analog.com/dsp/sigmadsp/f/q-a/64255/adau1467-sample-rate-converter-problem I have also been examining SigmaStudio and the blocks with parameters tha
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ADAU1466 ASRC for DSP internal data
Hi, I'm looking for an example on how to do samplerate conversion for DSP internal data using the ASRC blocks. I'm using the ADAU1466 evaluation board and run a program on 48kHz. I'd like to do most p
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output rate conversion ratios for ASRC
Why am I seeing different output rate conversion ratios for the 4 ASRCs I am using when I have them set to the same source and output rate? In the ASRC tab I see the following output rate conversion r
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ADAU1452 Eval @ 96 or 192kHz
I'm investigating the use of the ADAU1452 for a 96kHz or 192kHz project, and am wondering if the eval board would be helpful, given the (baffling) restriction that the CODEC is stuck at 48kHz that's b
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Adding TOSLINK / optical input to 1701 project?
I have an older design using an ADAU1701, and we'd like to upgrade it to include consumer-grade TOSLINK (optical input), but I don't want to add too much cost. From my reading, this gets complicated,
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ADAU1446 I2S sample rate
Hi! We have a custom board with a ADAU1446 SigmaDSP and a AD1939 CODEC, both running with a master clock of 12,288MHz and sample rate of 48kHz. We would like to connect a Bluetooth board/chip over I2S
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ADAU1442 ASRC Implementation
Hello Everybody! My proposed design involves an ASRC in which the Sigma DSP accepts S/PDIF input signals at different sampling rates and output as a S/PDIF signal as well. Say for example, incoming si
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ASRC output rate setting for the ADAU145x ADAU145x
Hi, According to the data sheet for both ADAU145x, ADAU144x, there are register to set ASRC output rate and are selection like "DSP RATE" or "DSP Core Audio Sampling Rate" "Internal FS" What is the di
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About SRC in ADAU1442
Dear support team, Could you tell me about SRC details below ,please? 1.Lock time of SRC from enabling SRC. 2.Ouput delay time of SRC from enabling SRC. Lock time + Group delay? 3.Behavior of SRC when
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ADAU1442 Flexible TDM6 Configuration with ASRC
I am trying to get the following configuration to work, but failing. Am I trying to do something impossible? Serial I/O 0 : TDM6 - 6 channel - 16 bit per channel - (Flexible TDM Mode) ADAU1442 is slav
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ADAU1446 ASRC
I have two digital audio devices that will not be synchronized to each other and that I want to exchange digital audio back and forth between. Into and out of each device there are 4 lines of I2S TDM4