{"product_id":"a-154-sequencer-controller","title":"Doepfer - A-154","description":"\u003cp\u003e\u003cb\u003eManufacturer Description\u003c\/b\u003e\u003cspan\u003e:\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eModule \u003c\/span\u003e\u003cb\u003ea-154\u003c\/b\u003e\u003cspan\u003e is a supplement to the \u003c\/span\u003e\u003cb\u003ea-155 analog\/trigger\u003c\/b\u003e\u003cspan\u003e sequencer module. it offers a lot of new features that are not available in the basic control unit of the a-155. the a-154 is used to replace the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003econtrol unit of one or two a-155, i.e. the section marked \"control\" with\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003estart \/ stop \/ step \/ reset buttons and inputs in the upper left corner\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eof the a-155 front panel. if the a-154 is used to control the a-155 the\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003econtrol section of the a-155 is put out of action.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cbr\u003e \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/fwok9H12Aj0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" width=\"560\" height=\"315\" frameborder=\"0\"\u003e\u003c\/iframe\u003e \u003cbr\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eFeatures of the a-154:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eSeveral running modes: \u003cb\u003eforward, backward, pendulum,\u003c\/b\u003e \u003cb\u003erandom\u003c\/b\u003e, \u003cb\u003eCV controlled step addressing. \u003c\/b\u003eAll modes are available as \u003cb\u003eloop\u003c\/b\u003e or \u003cb\u003eone-shot\u003c\/b\u003e.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eLED display of the 5 different current modes and one LED for loop\/one-shot display\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eManual and \u003cb\u003evoltage controlled selection\u003c\/b\u003e (with attenuator) of the \u003cb\u003erunning mode\u003c\/b\u003e. If no external control voltage is applied one of the 10 modes (5 modes x 2 loop\/one-shot) is simply selected with a rotary knob. The CV input with attenuator is used to modulate the running mode with an external control voltage (digital high\/low CV to switch between two modes or continuous analog CV to sweep through different modes). With the combination of manual control and CV with attenuator it is possible e.g. to use only two neighboring modes (e.g. forward\/backward) or sweep through all possible running modes\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eManual and \u003cb\u003evoltage controlled selection \u003c\/b\u003e(with attenuator) of \u003cb\u003efirst and last step\u003c\/b\u003e of the sequence. The range is step 1...8 in 8 step mode resp. 1...16 in 16 step mode\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eIf the running mode \"\u003cb\u003eCV Controlled Step Address\"\u003c\/b\u003e is selected the First Step section is used to determine the active sequencer step. Consequently manual and \u003cb\u003evoltage controlled selection\u003c\/b\u003e (with attenuator) \u003cb\u003eof the active step\u003c\/b\u003e is possible: the active step can be set by hand with the first step manual control and then modulated by an external control voltage (e.g. LFO, Random, S\u0026amp;H, Theremin, Light CV source, Joy Stick) at the first step CV input (with attenuator).\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eAn internal \u003cb\u003evoltage controlled clock generator\u003c\/b\u003e with manual and CV control (with attenuator) is available. The output of the clock generator is displayed with a LED and is used as sequencer clock provided that no external clock signal is connected to the \u003ci\u003eClock In\u003c\/i\u003e socket (normalled socket). If the CV input of the Clock section is connected to one of the analog outputs of the sequencer the time for each step can be set separately. Even jumps (or \u003cb\u003eskipping\u003c\/b\u003e) will be possible as we will introduce the feature that a very short clock pulse will be generated if the control voltage exceeds a certain value. For example the gate row of the A-155 can be used to obtain skipping of steps: the gate output simply has to be conneted to the CV input of the A-154 clock generator. If the corresponding switch of the A-155 is set correspondingly in the gate row the step will be skipped.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eManual and \u003cb\u003evoltage controlled\u003c\/b\u003e (with attenuator) \u003cb\u003epulse width\u003c\/b\u003e (PW) of the clock signal. This features can be used to obtain a \u003cb\u003edifferent gate length for each step\u003c\/b\u003e: e.g. one of the CV outputs of the A-155 can be used to control the PW. With a PW control voltage coming from a LFO\/random\/S\u0026amp;H the gate length will change automatically. CV coming from Theremin A-178, ribbon controller A-198, light controlled CV A-179, joy stick A-174 are other ways to control the gate length.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003e\u003cb\u003e8\/16 step mode\u003c\/b\u003e: A toggle switch us used to select 8 or 16 steps. The \"16 step\" mode requires two A-155 and one or more \u003cb\u003evoltage controlled switches \u003c\/b\u003e(e.g. A-150-1 or A-150-8). The voltage controlled switches are controlled by the \"A3\" output of the A-154. This output remains \"low\" as long as the active step is in the range 1...8 and turns to \"high\" in the range 9...16. The voltage controlled switches are used to switch between the CV\/trigger\/gates outputs of the first A-155 (step 1...8) and the second A-155 (step 9...16). In the A-154 user's manual the corresponding patch is shown.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eIf \u003cb\u003etwo A-155\u003c\/b\u003e are used they can work in \u003cb\u003eparallel\u003c\/b\u003e (8 steps) or \u003cb\u003eserial\u003c\/b\u003e (16 steps). The \u003cb\u003e8\/16 steps switch\u003c\/b\u003e determines if the \u003cb\u003e8 step mode\u003c\/b\u003e (one A-155 or two A-155 in parallel) or the \u003cb\u003e16 step mode\u003c\/b\u003e (two A-155 serial) is chosen. Both modes work with CV controlled step addressing too (see below). In 8 step mode only the steps 1...8 are addressed, in 16 step mode the steps 1...16. For \u003cb\u003eserial operation\u003c\/b\u003e an additional \u003cb\u003eVC switch\u003c\/b\u003e (A-150) is required - as mentioned above.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eThe functions of the \u003cb\u003eStart\/Stop\/Step\/Reset\u003c\/b\u003e buttons and inputs are the same as for the \"old\" control unit of the A-155:\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eA high level at the \u003cb\u003eStart input\u003c\/b\u003e or operating the \u003cb\u003eStart button\u003c\/b\u003e starts the sequence from the momentarily addressed step. Not working in \"CV controlled step address\" mode.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eA high level at the \u003cb\u003eStop input\u003c\/b\u003e or operating the \u003cb\u003eStop button\u003c\/b\u003e stops the sequence (the last active step remains addressed). Not working in \"CV controlled step address\" mode.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eA high level at the \u003cb\u003eReset input\u003c\/b\u003e or operating the \u003cb\u003eReset button\u003c\/b\u003e resets the sequence to step 1. The sequence remains at step 1 as long as the Reset input level is high (function is activated by high level, not by low\/high transition). Not working in \"CV controlled step address\" mode.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eA positive transition (low -\u0026gt; high) at the \u003cb\u003eStep input\u003c\/b\u003e or operating the \u003cb\u003eStep button\u003c\/b\u003e causes an advance to the next step. The step input is connected to the clock output of the internal clock generator provided that no plug is inserted to the step input socket. Not working in \"CV controlled step address\" mode.\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003cli\u003e \u003cp\u003e\u003cspan\u003eManual and \u003cb\u003evoltage controlled selection \u003c\/b\u003ebetween \"old\" A-155 control or A-154 control of the A-155 connected to A-154 (A-154 master on\/off function)\u003c\/span\u003e\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/H-r0ebgE56o\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" width=\"560\" height=\"315\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eRemark:\u003c\/b\u003e\u003cspan\u003e with the one-shot modes the a-155\/a-154 combination can be used e.g. as a complex envelope generator. the gate resp. trigger signal is applied to the start input of the a-154. one analog row determines the levels of the envelope. the second analog row can be used to adjust the time length for each step. the gate row can be used to select between smooth (glide = on) or hard (glide = off) transition between succeeding levels. for the one-shot version of random the sequence continues until accidentially the last step is addressed. then the sequence stops. the combination of one-shot and cv addressed step selection is not available as it does not make sense.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eInstallation of the A-154:\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003eThe 10 pin ribbon cable, that was used to connect the A-155 control section with the rest of the A-155 module has to be removed and plugged to the new A-154 sequencer controller. Therefore the A-154 has to be mounted on the right side of the A-155. In case that two A-155 have to be controlled the A-155 have to be mounted one on top of the other and the A-154 on the right side of the upper or lower A-155. Attention ! In case of two A-155 the second A-155 cannot be controlled by its \"old\" control unit. In this case both A-155 are controlled by the A-154 or the \"old\" control unit of the first A-155 (depending upon the position of the A-154 master switch).\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eControls:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eManual Mode\u003c\/li\u003e \u003cli\u003eMode CV (attenuator)\u003c\/li\u003e \u003cli\u003eMode display (5 LEDs)\u003c\/li\u003e \u003cli\u003eOne Shot display (1 LED)\u003c\/li\u003e \u003cli\u003eManual First Step (= addressed step in \"CV addressed mode\")\u003c\/li\u003e \u003cli\u003eFirst Step CV (attenuator)\u003c\/li\u003e \u003cli\u003eManual Last Step\u003c\/li\u003e \u003cli\u003eLast Step CV (attenuator)\u003c\/li\u003e \u003cli\u003eManual Clock\u003c\/li\u003e \u003cli\u003eClock CV (attenuator)\u003c\/li\u003e \u003cli\u003eManual PW\u003c\/li\u003e \u003cli\u003ePW CV (attenuator)\u003c\/li\u003e \u003cli\u003eClock display (LED)\u003c\/li\u003e \u003cli\u003e8\/16 Step (toggle switch)\u003c\/li\u003e \u003cli\u003eStart,Stop,Step Reset (buttons)\u003c\/li\u003e \u003c\/ul\u003e \u003cb\u003eInputs\/outputs:\u003c\/b\u003e\u003cbr\u003e \u003cul\u003e \u003cli\u003eMode CV\u003c\/li\u003e \u003cli\u003eFirst Step CV (= address CV in \"CV addressed mode\")\u003c\/li\u003e \u003cli\u003eLast Step CV\u003c\/li\u003e \u003cli\u003eClock CV\u003c\/li\u003e \u003cli\u003ePW CV\u003c\/li\u003e \u003cli\u003e9-16\/A3 Out\u003c\/li\u003e \u003cli\u003eClock Out (2x)\u003c\/li\u003e \u003cli\u003eStart, Stop, Reset, Step (input sockets)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cspan\u003eThis module has a maximum current draw of 60ma. it requires 22 te\/hp worth of space to fit in a eurorack frame.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/yOcsL_SbmPw\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" width=\"560\" height=\"315\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Doepfer","offers":[{"title":"Default Title","offer_id":54725925175637,"sku":null,"price":99.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/1872\/3413\/files\/a154_1356abfc-9886-46d1-aee8-d006dfce6173.jpg?v=1787442553","url":"https:\/\/climivor.myshopify.com\/products\/a-154-sequencer-controller","provider":"CLIMIVOR","version":"1.0","type":"link"}